[Code of Federal Regulations]
[Title 26, Volume 1]
[Revised as of April 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 26CFR1.47-1]

[Page 291-303]
 
                       TITLE 26--INTERNAL REVENUE
 
     CHAPTER I--INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY
 
PART 1--INCOME TAXES--Table of Contents
 
Sec. 1.47-1  Recomputation of credit allowed by section 38.

    (a) General rule--(1) In general. (i) If during the taxable year any 
section 38 property the basis (or cost) of which was taken into account, 
under paragraph (a) of Sec. 1.46-3, in computing the taxpayer's 
qualified investment is disposed of, or otherwise ceases to be section 
38 property or becomes public utility property (as defined in paragraph 
(g) of Sec. 1.46-3) or is a qualifying commuter highway vehicle (as 
defined in paragraph (a) of Sec. 1.46-11) which undergoes a change in 
use (as defined in paragraph (m)(2) of this section) with respect to the 
taxpayer, before the close of the estimated useful life (as determined 
under subparagraph (2)(i) of this paragraph) which was taken into 
account in computing such qualified investment, then the credit earned 
for the credit year (as defined in subdivision (ii) (a) of this 
subparagraph) shall be recomputed under the principles of paragraph (a) 
of Sec. 1.46-1 and paragraph (a) of Sec. 1.46-3 substituting, in lieu of 
the estimated useful life of the property that was taken into account 
originally in computing qualified investment, the actual useful life of 
the property as determined under subparagraph (2)(ii) of this paragraph. 
There shall also be recomputed under the principles of Secs. 1.46-1 and 
1.46-2 the credit allowed for the credit year and for any other taxable 
year affected by reason of the reduction in credit earned for the credit 
year, giving effect to such reduction in the computation of carryovers 
or carrybacks of unused credit. If the recomputation described in the 
preceding sentence results in the aggregate in a decrease (taking into 
account any recomputations under this paragraph in respect of prior 
recapture years, as defined in subdivision (ii)(b) of this subparagraph) 
in the credits allowed for the credit year and for any other taxable 
year affected by the reduction in credit earned for the credit year, 
then the income tax for the recapture year shall be increased by the 
amount of such decrease in credits allowed. For treatment of such 
increase in tax, see paragraph (b) of this section. For rules relating 
to ``disposition'' and ``cessation'', see Sec. 1.47-2. For rules 
relating to certain exceptions to the application of this section, see 
Sec. 1.47-3. For special rules in the case of an electing small business 
corporation (as defined in section 1371(b)), an estate or trust, or a 
partnership, see respectively, Secs. 1.47-4, 1.47-5, or 1.47-6. For 
rules applicable to energy property, see paragraph (h) of this section. 
For special rules relating to recomputation of credit allowed by section 
38 if progress expenditure property (as defined in Sec. 1.46-5(d)) 
ceases to be progress expenditure property with respect to the taxpayer, 
see paragraph (g) of this section.
    (ii) For purposes of this section and Secs. 1.47-2 through 1.47-6--
    (a) The term ``credit year'' means the taxable year in which section 
38 property was taken into account in computing a taxpayer's qualified 
investment.
    (b) The term ``recapture year'' means the taxable year in which 
section 38 property the basis (or cost) of which was taken into account 
in computing a

[[Page 292]]

taxpayer's qualified investment is disposed of, or otherwise ceases to 
be section 38 property or becomes public utility property with respect 
to the taxpayer, before the close of the estimated useful life which was 
taken into account in computing such qualified investment.
    (c) The term ``recapture determination'' means a recomputation made 
under this paragraph.
    (2) Rules for applying subparagraph (1). For purposes of 
subparagraph (1) of this paragraph--
    (i) In determining whether section 38 property is disposed of, or 
otherwise ceases to be section 38 property with respect to the taxpayer, 
before the close of the estimated useful life which was taken into 
account in computing the taxpayer's qualified investment, the term 
``estimated useful life'' means the shortest life of the useful life 
category within which falls the estimated useful life which was assigned 
to such property under paragraph (e) of Sec. 1.46-3. Thus, section 38 
property which is assigned, under paragraph (e) of Sec. 1.46-3, an 
estimated useful life of 6 years shall not be treated, for purposes of 
subparagraph (1) of this paragraph, as having been disposed of before 
the close of its estimated useful life if such property is sold 5 years 
(that is, the shortest life of the 5 years or more but less than 7 years 
useful life category) after the date on which it was placed in service. 
Likewise, section 38 property with an estimated useful life of 15 years 
which is placed in service on January 1, 1972, shall not be treated as 
having been disposed of before the close of its estimated useful life if 
such property is sold at any time after January 1, 1979 (that is, 7 
years or more after the date on which it was placed in service).
    (ii) In determining the recomputed qualified investment with respect 
to property which is disposed of or otherwise ceases to be section 38 
property the term ``actual useful life'' means, except as otherwise 
provided in this section and Secs. 1.47-2 through 1.47-6, the period 
beginning with the date on which the property was placed in service by 
the taxpayer and ending with the date of such disposition or cessation. 
See paragraph (c) of this section.
    (iii) In determining the recomputed qualified investment with 
respect to property which ceases to be section 38 property with respect 
to the taxpayer after August 15, 1971, or which becomes public utility 
property after such date, such property shall be treated as if it were 
property described in section 50 at the time it was placed in service 
(whether or not it was property described in section 50 at such time). 
Thus, if property was placed in service on October 15, 1968, and was 
assigned an estimated useful life of 4 years, there would be no increase 
in tax under section 47 if the property were disposed of at any time 
after October 14, 1971, that is, 3 years or more after the property was 
placed in service.
    (b) Increase in income tax and reduction of investment credit 
carryover--(1) Increase in tax. Except as provided in subparagraph (2) 
of this paragraph, any increase in income tax under this section shall 
be treated as income tax imposed on the taxpayer by chapter 1 of the 
Code for the recapture year notwithstanding that without regard to such 
increase the taxpayer has no income tax liability, has a net operating 
loss for such taxable year, or no income tax return was otherwise 
required for such taxable year.
    (2) Special rule. Any increase in income tax under this section 
shall not be treated as income tax imposed on the taxpayer by chapter 1 
of the Code for purposes of determining the amount of the credits 
allowable to such taxpayer under--
    (i) Section 33 (relating to taxes of foreign countries and 
possessions of United States),
    (ii) Section 34 (relating to dividends received by individuals 
before January 1, 1965),
    (iii) Section 35 (relating to partially tax-exempt interest received 
by individuals),
    (iv) Section 37 (relating to retirement income), and
    (v) Section 38 (relating to investment in certain depreciable 
property).
    (3) Reduction in credit allowed as a result of a net operating loss 
carryback. (i) If a net operating loss carryback from the recapture year 
or from any taxable year subsequent to the recapture year reduces the 
amount allowed as a credit

[[Page 293]]

under section 38 for any taxable year up to and including the recapture 
year, then there shall be a new recapture determination under paragraph 
(a) of this section for each recapture year affected, taking into 
account the reduced amount of credit allowed after application of the 
net operating loss carryback.
    (ii) Subdivision (i) of this subparagraph may be illustrated by the 
following examples:

    Example 1. (a) X Corporation, which makes its return on the basis of 
a calendar year, acquired and placed in service on January 1, 1962, an 
item of section 38 property with a basis of $10,000 and an estimated 
useful life of 8 years. The amount of qualified investment with respect 
to such asset was $10,000. For the taxable year 1962, X Corporation's 
credit earned of $700 (7 percent of $10,000) was allowed under section 
38 as a credit against its liability for tax of $700. In 1963 and 1964 X 
Corporation had no liability for tax and placed in service no section 38 
property. On January 3, 1963, such item of section 38 property was sold 
to Y Corporation. Since the actual useful life of such item was only 1 
year, there was a recapture determination under paragraph (a) of this 
section. The income tax imposed by chapter 1 of the Code on X 
Corporation for the taxable year 1963 was increased by the $700 decrease 
in its credit earned for the taxable year 1962 (that is, the $700 
original credit earned minus zero recomputed credit earned).
    (b) For the taxable year 1965, X Corporation has a net operating 
loss which is carried back to the taxable year 1962 and reduces its 
liability for tax, as defined in paragraph (c) of Sec. 1.46-1, for such 
taxable year to $200. As a result of such net operating loss carryback, 
X Corporation's credit allowed under section 38 for the taxable year 
1962 is limited to $200 and the excess of $500 ($700 credit earned minus 
$200 limitation based on amount of tax) is an investment credit 
carryover to the taxable year 1963.
    (c) For 1965, there is a recapture determination under subdivision 
(i) of this subparagraph for the 1963 recapture year. The $700 increase 
in the income tax imposed on X Corporation for the taxable year 1963 is 
redetermined to be $200 (that is, the $200 credit allowed after taking 
into account the 1965 net operating loss minus zero credit which would 
have been allowed taking into account the 1963 recapture determination). 
In addition, X Corporation's $500 investment credit carryover to the 
taxable year 1963 is reduced by $500 ($700 minus $200) to zero and X 
Corporation is entitled to a $500 refund of the tax paid as a result of 
the 1963 determination.
    Example 2. (a) X Corporation, which makes its returns on the basis 
of a calendar year, acquired and placed in service on January 1, 1962, 
an item of section 38 property with a basis of $10,000 and an estimated 
useful life of 8 years. The amount of qualified investment with respect 
to such asset was $10,000. For the taxable year 1962, X Corporation's 
credit earned of $700 (7 percent of $10,000) was allowed under section 
38 as a credit against its liability for tax of $700. In 1963 and in 
1964 X Corporation had no liability for tax and placed in service no 
section 38 property. On January 3, 1965, such item of section 38 
property is sold to Y Corporation. For the taxable year 1965, X 
Corporation has a net operating loss which is carried back to the 
taxable year 1962 and reduces its liability for tax, as defined in 
paragraph (c) of Sec. 1.46-1, for such taxable year to $100.
    (b) As a result of such net operating loss carryback, X 
Corporation's credit allowed under section 38 for the taxable year 1962 
is limited to $100 and the excess of $600 ($700 credit earned minus $100 
limitation based on amount of tax) is an investment credit carryover to 
the taxable year 1963.
    (c) Since the actual useful life of the item of section 38 property 
sold to Y Corporation was only 3 years, there is a recapture 
determination under paragraph (a) of this section. X Corporation's $600 
investment credit carryover to 1963 is reduced by $600 to zero. The 
income tax imposed by chapter 1 of the Code on X Corporation for the 
taxable year 1965 is increased by the $100 reduction in credit allowed 
by section 38 for 1962.

    (4) Statement of recomputation. The taxpayer shall attach to his 
income tax return for the recapture year a separate statement showing in 
detail the computation of the increase in income tax imposed on such 
taxpayer by chapter 1 of the Code and the reduction in any investment 
credit carryovers.
    (c) Date placed in service and date of disposition or cessation--(1) 
General rule. For purposes of this section and Secs. 1.47-2 through 
1.47-6, in determining the actual useful life of section 38 property--
    (i) Such property shall be treated as placed in service on the first 
day of the month in which such property is placed in service. The month 
in which property is placed in service shall be determined under the 
principles of paragraph (d) of Sec. 1.46-3.
    (ii) If during the taxable year such property ceases to be section 
38 property with respect to the taxpayer--
    (a) As a result of the occurrence of an event on a specific date 
(for example, a

[[Page 294]]

sale, transfer, retirement or other disposition), such cessation shall 
be treated as having occurred on the actual date of such event.
    (b) For any reason other than the occurrence of an event on a 
specific date (for example, because such property is used predominantly 
in connection with the furnishing of lodging during such taxable year), 
such cessation shall be treated as having occurred on the first day of 
such taxable year.
    (2) Special rule. Notwithstanding subparagraph (1) of this 
paragraph, if a taxpayer uses an averaging convention (see 
Sec. 1.167(a)(10)) in computing depreciation with respect to section 38 
property, then, for purposes of this section and Secs. 1.47-2 through 
1.47-6, he may use the assumed dates of additions and retirements in 
determining the actual useful life of such property provided such 
assumed dates are used consistently for purposes of subpart B of part IV 
of subchapter A of chapter 1 of the Code with respect to all section 38 
property for which such convention is used for purposes of depreciation. 
This subparagraph shall not apply in any case fwhere from all the facts 
and circumstances it appears that the use of such assumed dates results 
in a substantial distortion of the investment credit allowed by section 
38. Thus, for example, if the taxpayer computes depreciation under a 
convention under which the average of the beginning and ending balances 
of the asset account for the taxable year are taken into account, he may 
use July 1 as the assumed date of all additions and retirements to such 
account. Similarly, if the taxpayer computes depreciation under a 
convention under which the average of the beginning and ending balances 
of the asset account for each month is taken into account, he may use 
the date determined by reference to the weighted average of the monthly 
averages as the assumed date of all additions and retirements to such 
account.
    (3) Example. This paragraph may be illustrated by the following 
example:

    Example. Assume that section 38 property is placed in service 
(within the meaning of paragraph (d) of Sec. 1.46-3) on December 1, 1965 
(thus, the credit is treated as being earned in 1965) but under the 
taxpayer's depreciation practice the period for depreciation with 
respect to such property begins on January 1, 1966, and that the 
property is actually retired on December 2, 1970. Under the general rule 
of subparagraph (1) of this paragraph, the property is treated as placed 
in service on December 1, 1965, and as ceasing to be section 38 property 
with respect to the taxpayer on December 2, 1970, even though under the 
taxpayer's depreciation practice the period for depreciation with 
respect to such property begins on January 1, 1966, and terminates on 
January 1, 1971. However, under the special rule of subparagraph (2) of 
this paragraph the taxpayer may determine the actual useful life of the 
property by reference to the assumed dates of January 1, 1966, and 
January 1, 1971.

    (d) Examples. Paragraphs (a) through (c) of this section may be 
illustrated by the following examples:

    Example 1. (i) X Corporation, which makes its returns on the basis 
of the calendar year, acquired and placed in service on January 1, 1962, 
three items of section 38 property each with a basis of $12,000 and an 
estimated useful life of 15 years. The amount of qualified investment 
with respect to each such asset was $12,000. For the taxable year 1962, 
X Corporation's credit earned of $2,520 was allowed under section 38 as 
a credit against its liability for tax of $4,000. On December 2, 1965, 
one of the items of section 38 property is sold to Y Corporation.
    (ii) The actual useful life of the item of property which is sold on 
December 2, 1965, is three years and eleven months. The recomputed 
qualified investment with respect to such item of property is zero 
($12,000 basis multiplied by zero applicable percentage) and X 
Corporation's recomputed credit earned for the taxable year 1962 is 
$1,680 (7 percent of $24,000). The income tax imposed by chapter 1 of 
the Code on X Corporation for the taxable year 1965 is increased by the 
$840 decrease in its credit earned for the taxable year 1962 (that is, 
$2,520 original credit earned minus $1,680 recomputed credit earned).
    Example 2. (i) The facts are the same as in example 1 and in 
addition on December 2, 1966, a second item of section 38 property 
placed in service in the taxable year 1962 is sold to Y Corporation.
    (ii) The actual useful life of the item of property which is sold on 
December 2, 1966, is four years and eleven months. The recomputed 
qualified investment with respect to such item of property is $4,000 
($12,000 basis multiplied by 33\1/3\ percent applicable percentage) and 
X Corporation's recomputed credit earned for the taxable year 1962 is 
$1,120 (7 percent of $16,000). The income tax

[[Page 295]]

imposed by chapter 1 of the Code on X Corporation for the taxable year 
1966 is increased by $560 (that is, $1,400 ($2,520 original credit 
earned minus $1,120 recomputed credit earned) reduced by the $840 
increase in tax for 1965).
    Example 3. (i) The facts are the same as in example 1 except that 
for the taxable year 1962 X Corporation's liability for tax under 
section 46(a)(3) is only $1,520. Therefore, for such taxable year X 
Corporation's credit allowed under section 38 is limited to $1,520 and 
the excess of $1,000 ($2,520 credit earned minus $1,520 limitation based 
on amount of tax) is an unused credit. Of such $1,000 unused credit, 
$100 is allowed as a credit under section 38 for the taxable year 1963, 
$100 is allowed for 1964, and $800 is carried to the taxable year 1965.
    (ii) The actual useful life of the item of property which is sold on 
December 2, 1965, is three years and eleven months. The recomputed 
qualified investment with respect to such item of property is zero 
($12,000 basis multiplied by zero applicable percentage) and X 
Corporation's recomputed credit earned for the taxable year 1962 is 
$1,680 (7 percent of $24,000). If such $1,680 recomputed credit earned 
had been taken into account in place of the $2,520 original credit 
earned, X's credit allowed for 1962 would have been $1,520, and of the 
$160 unused credit from 1962 $100 would have been allowed as a credit 
under section 38 for 1963, and $60 would have been allowed for 1964. X 
Corporation's $800 investment credit carryover to the taxable year 1965 
is reduced by $800 to zero. The income tax imposed by chapter 1 of the 
Code on X Corporation for the taxable year 1965 is increased by $40 
(that is, the aggregate reduction in the credits allowed by section 38 
for 1962, 1963, and 1964).
    Example 4. (i) X Corporation, which makes its returns on the basis 
of the calendar year, acquired and placed in service on November 1, 
1962, an item of section 38 property with a basis of $12,000 and an 
estimated useful life of 10 years. The amount of qualified investment 
with respect to such property was $12,000. For the taxable year 1962, X 
Corporation's credit earned of $840 was allowed under section 38 as a 
credit against its liability for tax of $840. For each of the taxable 
years 1963 and 1964 X Corporation's liability for tax was zero and its 
credit earned was $400; therefore, for each of such years its unused 
credit was $400. For the taxable year 1965 its liability for tax was 
$200 and its credit earned was zero; therefore, $200 of the $400 unused 
credit from 1963 was allowed as credit for 1965 and $600 ($200 from 1963 
and $400 from 1964) is an investment credit carryover to 1966. On 
February 2, 1966, such item of section 38 property is sold to Y 
Corporation.
    (ii) The actual useful life of such item of property is three years 
and three months. The recomputed qualified investment with respect to 
such property is zero ($12,000 basis multipled by zero) and X 
Corporation's recomputed credit earned for the taxable year 1962 is 
zero. If such zero recomputed credit earned had been taken into account 
in place of the $840 original credit earned, the entire $400 unused 
credit from 1963 (including the $200 portion which was originally 
allowed as a credit for 1965) and the $400 unused credit from 1964 would 
have been allowed as investment credit carrybacks against X 
Corporation's liability for tax of $840 for 1962. (See Sec. 1.46-2 for 
rules relating to the carryback of unused credits.)
    (iii) Therefore, the $600 carryover from 1963 and 1964 to 1966 is 
eliminated and the income tax imposed by chapter 1 of the Code on X 
Corporation for the taxable year 1966 is increased by the $240 aggregate 
reduction in the credits allowed by section 38 for the taxable years 
1962 and 1965 (that is, $1,040 credit allowed minus $800 which would 
have been allowed).
    Example 5. (i) X Corporation, which makes its returns on the basis 
of the calendar year, acquired and placed in service on November 1, 
1962, an item of section 38 property with a basis of $10,000 and an 
estimated useful life of 8 years. The amount of qualified investment 
with respect to such asset was $10,000. For the taxable year 1962, X 
Corporation's credit earned of $700 was allowed as a credit against its 
liability for tax. For each of the taxable years 1963, 1964, and 1965 X 
had no taxable income. On July 3, 1966, the item of section 38 property 
is sold to Y Corporation. For the taxable year 1966 X Corporation has a 
net operating loss of $3,000.
    (ii) The actual useful life of the item of property is three years 
and eight months. The recomputed qualified investment with respect to 
such item of property is zero and X Corporation's recomputed credit 
earned for the taxable year 1962 is zero. Notwithstanding the $3,000 net 
operating loss for the taxable year 1966, the income tax imposed by 
chapter 1 of the Code on X Corporation for such year is $700 (that is, 
the decrease in its credit earned for the taxable year 1962).

    (e) Identification of property--(1) General rule--(i) Record 
requirements. In general, the taxpayer must maintain records from which 
he can establish, with respect to each item of section 38 property, the 
following facts:
    (a) The date the property is disposed of or otherwise ceases to be 
section 38 property,
    (b) The estimated useful life which was assigned to the property 
under paragraph (e) of Sec. 1.46-3,
    (c) The month and the taxable year in which the property was placed 
in service, and

[[Page 296]]

    (d) The basis (or cost), actually or reasonably determined, of the 
property.
    (ii) Recapture determination. For purposes of determining whether 
section 38 property is disposed of, or otherwise ceases to be section 38 
property with respect to the taxpayer, before the close of its estimated 
useful life, and for purposes of determining recomputed qualified 
investment, the taxpayer must establish from his records the facts 
required by subdivision (i) of this subparagraph.
    (iii) Examples. If the taxpayer fails to maintain records from which 
he can establish the facts required by subdivision (i) of this 
subparagraph, then this section shall be applied to the taxpayer in the 
manner indicated in the following examples:

    Example 1. Corporation X, organized on January 1, 1964, files its 
income tax return on the basis of a calendar year. During the years 1964 
and 1965, X places in service several items of machinery to which it 
assigns estimated useful lives of 8 years. X places the items of 
machinery in a composite account for purposes of computing depreciation. 
When X's 1966 return is being audited, X is unable to establish whether 
the items placed in service in 1964 and 1965 were still on hand at the 
end of 1966. Therefore, for purposes of paragraph (a) of this section, X 
is treated as having disposed of, in 1966, all of the items of machinery 
placed in service in 1964 and 1965.
    Example 2. Corporation Y, organized on January 1, 1960, files its 
income tax return on the basis of a calendar year. During each of the 
years 1960 through 1965, Y places in service four items of machinery to 
each of which it assigns an estimated useful life of 8 years for 
depreciation purposes (and for purposes of computing qualified 
investment for relevant years). Y places the items of machinery in a 
composite account for purposes of computing depreciation (and for 
purposes of computing qualified investment for relevant years). When Y's 
1965 return is being audited, Y can establish that it retired during 
1965 only six items of this machinery. However, Y cannot establish the 
date on which these six items were placed in service, nor can Y 
establish that the items placed in service in 1963 or 1964 are still on 
hand as of the end of 1965. No previous recapture has taken place with 
respect to any of the items placed in service in 1963 or 1964. Assuming 
that paragraph (e) (2) and (3) of this section is not applicable, Y is 
treated, for purposes of paragraph (a) of this section, as having 
disposed of, in 1965, the four items placed in service in 1964, the most 
recent year before 1965 in which such property was placed in service, 
and two items from 1963, the next most recent year.
    Example 3. The facts are the same as in example 2 except that when 
Y's 1966 return is being audited, Y can establish from its records that 
all four items placed in service in 1965 are still on hand and that only 
three items were retired in 1966. For purposes of paragraph (a) of this 
section, Y is treated as having disposed of, in 1966, the two remaining 
items of machinery placed in service in 1963, and one of the items 
placed in service in 1962.

    (2) Treatment of ``mass assets''. (i) If, in the case of mass assets 
(as defined in subparagraph (4) of this paragraph), it is impracticable 
for the taxpayer to maintain records from which he can establish with 
respect to each item of section 38 property the facts required by 
subparagraph (1) of this paragraph, and if he adopts other reasonable 
recordkeeping practices, consonant with good accounting and engineering 
practices, and consistent with his prior recordkeeping practices, then 
he may substitute data from an appropriate mortality dispersion table. 
An appropriate mortality dispersion table must be based on an acceptable 
sampling of the taxpayer's actual experience or other acceptable 
statistical or engineering techniques. In lieu of such mortality 
dispersion table, the taxpayer may use a standard mortality dispersion 
table prescribed by the Commissioner. If the taxpayer uses such standard 
mortality dispersion table for any taxable year, it must be used for all 
subsequent taxable years unless the taxpayer obtains the consent of the 
Commissioner to change. If mass assets are placed in a multiple asset 
account and if the depreciation rate for such account is based on the 
maximum expected life of the longest lived asset in such account, in 
applying a mortality dispersion table (including a standard mortality 
dispersion table) the average expected useful life of the mass assets in 
such account must be used.
    (ii) Subdivision (i) of this subparagraph shall not apply with 
respect to assets placed in service in a taxable year ending on or after 
June 30, 1967, and beginning before January 1, 1971, or with respect to 
assets placed in service for a taxable year beginning after

[[Page 297]]

December 31, 1970, for which the taxpayer has not made the election 
provided by section 167(m), unless the estimated useful lives which were 
assigned to such assets for purposes of determining qualified 
investment--
    (a) Were separate lives based on the estimated range of years taken 
into account in establishing the average useful life of assets similar 
in kind under paragraph (e)(3)(ii)(b) of Sec. 1.46-3, and
    (b) Were determined by use of a mortality dispersion table 
(including a standard mortality dispersion table).
    (iii) Any standard mortality dispersion table prescribed by the 
Commissioner shall be based on average useful life categories and with 
respect to each category shall contain five columns, the first four of 
which shall state the percentage of property assumed to have a useful 
life of--

    Column (1): Less than 4 years,
    Column (2): 4 years or more but less than 6 years,
    Column (3): 6 years or more but less than 8 years, and
    Column (4): 8 years or more.


The fifth column shall show the total qualified investment as a 
percentage and shall be used in connection with the determination to be 
made under Sec. 1.46-3(e)(3)(iii). In the case of a table which is to 
apply to property which is described in section 50 or to property which 
is treated as property described in section 50 under paragraph 
(a)(2)(iii) of this section, this subdivision shall be applied by 
substituting ``3 years'' for ``4 years'', ``5 years'' for ``6 years'', 
and ``7 years'' for ``8 years''.
    (iv) Whenever the standard mortality dispersion table is used for a 
taxable year under subdivision (i) of this subparagraph (whether or not 
such table was used in determining qualified investment), the percentage 
of property shown in column (1) of the table shall (for purposes of 
section 47, this section, and Secs. 1.47-2 through 1.47-6) be deemed to 
have been disposed of on the day before the expiration of the 4-year 
period beginning on the date on which it was considered as placed in 
service under Sec. 1.47-1(c); the percentage of property shown in column 
(2) of the table shall be deemed to have been disposed of on the day 
before the expiration of the 6-year period beginning on the date on 
which it was so considered as placed in service; and the percentage of 
property shown in column (3) shall be deemed to have been disposed of on 
the day before the expiration of the 8-year period beginning on the date 
on which it was so considered as placed in service. In applying this 
subdivision for purposes of recomputing qualified investment, the proper 
average useful life category shall be used whether or not such category 
was used in determining qualified investment. In the case of property 
which is described in section 50 or property which is treated as 
property described in section 50 under paragraph (a)(2)(iii) of this 
section (other than property the qualified investment with respect to 
which was determined by use of the standard or an appropriate mortality 
dispersion table), this subdivision shall be applied by substituting 
``3-year period'' for ``4-year period'', ``5-year period'' for ``6-year 
period'', and ``7-year period'' for ``8-year period''.
    (v) In lieu of using subdivision (iv) of this subparagraph for 
purposes of recomputing qualified investment, a taxpayer may, for the 
first recapture year (as defined in paragraph (a)(1)(ii)(b) of this 
section) to which such subdivision (iv) would otherwise apply with 
respect to any mass asset account, recompute qualified investment on the 
basis of the difference between (a) the proper total qualified 
investment based on the percentage shown in column (5) of the table, and 
(b) the total qualified investment actually claimed by the taxpayer for 
the year in which the property was placed in service.

    Example. Assume that the taxpayer places in service during 1963 mass 
assets costing him $100,000, that he places these assets in a multiple 
asset account for which he properly claims a useful life of 6 years and 
a qualified investment of $66,667 (\2/3\x $100,000), and that he is 
allowed an investment credit of $4,667.67. When the taxpayer's 1967 
return is being audited he is unable to establish that any of the mass 
assets placed in service in 1963 were still on hand at the end of 1967.
    The taxpayer elects to use the standard mortality dispersion table 
prescribed by the Commissioner to determine the amount of recapture with 
respect to these mass assets. Assume that the table prescribed by the 
Commissioner shows with respect to mass assets with an average useful 
life of 6 years the following:

[[Page 298]]



------------------------------------------------------------------------
Percent of property assumed to have a useful life of--
-------------------------------------------------------
               4 years or    6 years or                  Total qualified
 Less than 4    more, but     more, but    8 years or      investment
    years      less than 6   less than 8      more          (percent)
                  years         years
------------------------------------------------------------------------
      (1)           (2)           (3)           (4)             (5)
------------------------------------------------------------------------
    15.87         34.13         34.13         15.87           50.00
------------------------------------------------------------------------

    (a) Under these circumstances 15.87 percent of the mass assets 
placed in service in 1963 are deemed to have been disposed of during 
1967. With respect to these assets, the amount of qualified investment 
for 1963 was $10,580 ($15,870x\2/3\) and the amount of credit earned was 
$740.60 (7 percent of $10,580), whereas the recomputed qualified 
investment is zero and the recomputed credit earned is zero. Thus, the 
tax imposed by chapter 1 of the Code for 1967 is increased by $740.60.
    (b) No recapture determination is required for 1968 since no assets 
are deemed to have been disposed of in that year. During 1969, 34.13 
percent of the mass assets placed in service in 1963 are deemed to have 
been disposed of. With respect to these assets, the amount of qualified 
investment for 1963 was $22,753.34 ($34,130x\2/3\) and the amount of 
credit earned was $1,592.73 (7 percent of $22,753.34), whereas the 
recomputed qualified investment is $11,376.67 ($34,130x\1/3\) and the 
recomputed credit earned is $796.37 (7 percent of $11,376.67). Thus, the 
tax imposed by chapter 1 of the Code for 1969 is increased by $796.36 
($1,592.73 minus $796.37).
    (c) If the taxpayer chooses to recompute qualified investment by 
using the method provided in subdivision (v) of this subparagraph, the 
increase in tax for 1967 (the first recapture year) would be $1,167.67, 
i.e., the original credit earned, $4,667.67, minus the recomputed credit 
earned, $3,500 (50 percent, the percentage shown in column (5), of 
$100,000 multiplied by 7 percent). As long as the same average useful 
life category reflects the taxpayer's experience for subsequent years, 
no recapture determination will be required for any future year, except 
as provided by subparagraph (3)(iv) of this paragraph.

    (vi) Subdivision (i) of this subparagraph shall not apply with 
respect to section 38 property to which an election under section 167(m) 
applies unless the taxpayer assigns actual retirements of such section 
38 property for all taxable years to the same vintage account for 
purposes of section 47 and for purposes of computing the allowance for 
depreciation under section 167. The assignment of actual retirements of 
section 38 property for a taxable year to particular vintage accounts 
may be made on the basis of an appropriate mortality dispersion table 
(based on an acceptable sampling of the taxpayer's actual experience or 
other statistical or engineering techniques) or on the basis of a 
standard mortality dispersion table prescribed by the Commissioner. If 
the taxpayer assigns actual retirements for any taxable year to 
particular vintage accounts on the basis of such standard mortality 
dispersion table, actual retirements for all subsequent taxable years 
must be assigned to particular vintage accounts on the basis of such 
table. Actual retirements of section 38 property for a taxable year 
shall be assigned to particular vintage accounts by--
    (a) Determining the expected retirements for such taxable year from 
each vintage account containing such section 38 property, and
    (b) Ratably allocating such actual retirements to each vintage 
account containing such section 38 property.

However, the unadjusted basis of retired assets assigned to any 
particular vintage account shall not exceed the unadjusted basis of the 
property contained in such account.
    (3) Special rules. (i) Taxpayers who properly determine estimated 
useful lives under Sec. 1.46-3(e)(3) (ii)(b) or (iii) may treat such 
assets as having been disposed of or having ceased to be section 38 
assets in the order of the estimated useful lives that were assigned to 
such assets. Thus, the asset that is first disposed of or first ceases 
to be section 38 property may be treated as the asset to which there was 
assigned the shortest estimated useful life; the next asset disposed of 
or ceasing to be section 38 property may be treated as the asset to 
which there was assigned the second shortest life, etc.
    (ii) In the case of taxpayers who use the rule of subdivision (i) of 
this subparagraph with respect to mass assets for which the estimated 
useful life was determined under Sec. 1.46-3(e)(3)(iii), if the 
dispersion shown by the mortality dispersion table effective for a 
taxable year subsequent to the credit year is the same as the dispersion 
shown by the mortality table that was effective for the credit year (for 
example, if the

[[Page 299]]

same average useful life on the standard mortality dispersion table 
reflects the taxpayer's experience for both such years), no recapture 
determination is required for such subsequent taxable year.
    (iii) Notwithstanding subdivision (i) of this subparagraph, 
taxpayers who, for purposes of determining qualified investment, do not 
use a mortality dispersion table with respect to certain section 38 
assets similar in kind but who consistently assign under paragraph 
(e)(3)(ii) (b) of Sec. 1.46-3 to such assets separate lives based on the 
estimated range of years taken into consideration in establishing the 
average useful life of such assets, may select the order in which such 
assets shall be considered as having been disposed of, regardless of the 
taxable years in which such assets were placed in service. If a taxpayer 
uses the method provided in this subdivision to determine that any asset 
is considered as having been disposed of, then, in addition to complying 
with the record requirements of subparagraph (1)(i) of this paragraph, 
such taxpayer must maintain records from which he can establish to the 
satisfaction of the district director that such asset has not previously 
been considered as having been disposed of. In addition, if, for any 
taxable year, a taxpayer uses the method provided in this subdivision 
for any asset, he must use for such year and for each subsequent taxable 
year (unless he obtains the district director's consent to change) with 
respect to all assets similar in kind to such asset--
    (a) The method of determining estimated useful lives described in 
paragraph (e)(3)(ii)(b) of Sec. 1.46-3, and
    (b) The method he has selected under this subdivision for 
determining the order in which such assets are considered as having been 
disposed of.

A request by a taxpayer to obtain the district director's consent to 
change a system or method described in this subdivision with respect to 
assets similar in kind must be submitted to the district director on or 
before the last day of the taxable year with respect to which the change 
is sought.
    (iv) Notwithstanding subdivisions (i), (ii), and (iii) of this 
subparagraph, there shall be taken into account separately any abnormal 
retirement of section 38 property of substantial value for which the 
estimated useful life was determined under Sec. 1.46-3(e)(3) (ii)(b) or 
(iii). For definition of abnormal retirement, see paragraph (b) of 
Sec. 1.167(a)-8.
    (4) [Reserved]
    (5) Example. This paragraph may be illustrated by the following 
example:

    Example. (i) Taxpayer A uses numerous small returnable containers in 
his business. It is impracticable for A to keep individual detailed 
records with respect to such containers which are mass assets. In 1965, 
A places in service 10 million containers purchased for $1 million, and 
reasonably determines that each of such containers has a basis of 10 
cents. A places such containers in a multiple asset account to which is 
assigned a 5-year average useful life for purposes of computing 
depreciation. A has conducted an appropriate mortality study which shows 
that the containers have the following estimated useful lives:

------------------------------------------------------------------------
                                                                Useful
                      Percent of assets                          life
                                                                (years)
------------------------------------------------------------------------
10..........................................................           3
20..........................................................           6
40..........................................................           5
20..........................................................           6
10..........................................................           7
------------------------------------------------------------------------


A assigns separate lives to such assets based on the estimated range of 
years taken into account in establishing the average useful life of such 
containers. The qualified investment with respect to such containers is 
$400,000 computed as follows:

------------------------------------------------------------------------
                                                  Applicable   Qualified
             Useful life                 Basis    percentage  investment
------------------------------------------------------------------------
4...................................    $200,000     33\1/3\     $66,666
5...................................     400,000     33\1/3\     133,334
6...................................     200,000     66\2/3\     133,334
7...................................     100,000     66\2/3\      66,666
                                     -----------------------------------
      ..............................                             400,000
------------------------------------------------------------------------

A's credit earned for 1965 of $28,000 (7 percent times $400,000) is 
allowed as a credit under section 38 against A's liability for tax of $2 
million. (For purposes of this example the computations of investment 
credit and recapture with respect to containers placed in service in 
years other than 1965 are omitted.) The mortality studies effective for 
1966 and 1967 show that none of the containers placed in service in 1965 
was retired.
    (ii) A's mortality study effective with respect to 1968 shows that 
the containers are being retired as follows:

[[Page 300]]



------------------------------------------------------------------------
                                                                Useful
                      Percent of assets                          life
                                                                (years)
------------------------------------------------------------------------
30..........................................................           3
20..........................................................           4
30..........................................................           5
10..........................................................           6
10..........................................................           7
------------------------------------------------------------------------

Thus, the 1968 study shows that 30 percent of the 10 million containers 
placed in service in 1965 were retired in 1968. Under the rule of 
subparagraph (3)(i) of this paragraph, the 3 million containers are 
treated as consisting of the 1 million containers to which was assigned 
a 3-year useful life and the 2 million containers to which was assigned 
a 4-year useful life. Taking into account only the fact that 30 percent 
of the containers placed in service in 1965 had an actual life of less 
than 4 years, A's recomputed qualified investment for 1965 is $333,333 
and his recomputed credit earned is $23,333. A's income tax for 1968 is 
increased by $4,667 ($28,000 original credit earned minus $23,333 
recomputed credit earned).
    (iii) The mortality study effective for 1969 shows the same results 
as the mortality study effective for 1968. Thus, it shows that 2 million 
containers were retired in 1969 (an actual life of 4 years). Under the 
rule of subparagraph (3)(i) of this paragraph such 2 million containers 
are treated as having been among 4 million containers to which were 
assigned a 5-year useful life. Therefore, no recapture determination is 
required for 1969.
    (iv) The mortality study effective for 1970 shows the same results 
as the mortality study effective for 1968. Thus, it shows that 3 million 
containers were retired in 1970 (an actual life of 5 years). Under the 
rule of subparagraph (3)(i) of this paragraph, the 3 million are treated 
as having been assigned useful lives as follows: 2 million as having 
been assigned a useful life of 5 years, and 1 million as having been 
assigned a useful life of 6 years. Taking into account only the fact 
that 10 percent of the containers placed in service in 1965 had an 
actual life of 5 years rather than the 6 years estimated useful life 
assigned to them, A's recomputed qualified investment is $300,000 and 
A's credit earned for 1965 is $21,000. Thus, taking into account the 
1968 recapture determination A's income tax for 1970 is increased by 
$2,333.

    (f) Public utility property--(1) Recomputed qualified investment. In 
recomputing qualified investment with respect to section 38 property 
which becomes public utility property (as defined in paragraph (g) of 
Sec. 1.46-3)--
    (i) If such property becomes public utility property less than 3 
years from the date on which it was placed in service, then such 
property shall be treated as public utility property for its entire 
useful life.
    (ii) If such property becomes public utility property 3 years or 
more but less than 5 years from the date on which it was placed in 
service, then such property shall be treated as section 38 property 
which is not public utility property for the first 3 years of its 
estimated useful life and as public utility property for the remaining 
period of its estimated useful life.
    (iii) If such property becomes public utility property 5 years or 
more but less than 7 years from the date on which it was placed in 
service, then such property shall be treated as section 38 property 
which is not public utility property for the first 5 years of its 
estimated useful life and as public utility property for the remaining 
period of its estimated useful life.

If property becomes public utility property before August 16, 1971, this 
subparagraph shall be applied by substituting ``4 years'' for ``3 
years'', ``6 years'' for ``5 years'', and ``8 years'' for ``7 years''.
    (2) Examples. Subparagraph (1) of this paragraph may be illustrated 
by the following examples:

    Example 1. (i) X Corporation, which makes its returns on the basis 
of the calendar year, acquired and placed in service on January 1, 1969, 
an item of section 38 property with a basis of $12,000 and an estimated 
useful life of 8 years. The amount of qualified investment with respect 
to such property was $12,000. For the taxable year 1969, X Corporation's 
credit earned was $840 (7 percent of $12,000) and for such taxable year 
X Corporation was allowed under section 38 a credit of $840 against its 
liability for tax. During the taxable year 1972 such property becomes 
public utility property (as defined in paragraph (g) of Sec. 1.46-3) 
with respect to X Corporation.
    (ii) Such item of section 38 property is treated as section 38 
property which is not public utility property for the first 3 years of 
its 8-year estimated useful life and is treated as public utility 
property for the remaining 5 years. The recomputed qualified investment 
with respect to such item of section 38 property is $7,428, computed as 
follows:

$12,000 basisx33\1/3\ percent applicable percentage...........    $4,000
$12,000 basisx \3/7\ x66\2/3\ percent applicable percentage...     3,428
                                                               ---------
    Total recomputed qualified investment.....................     7,428



X Corporation's recomputed credit earned for the taxable year 1969 is 
$520 (7 percent of $7,428). The income tax imposed by chapter 1

[[Page 301]]

of the Code on X Corporation for the taxable year 1972 is increased by 
the $320 decrease in its credit earned for the taxable year 1969 (that 
is, $840 original credit earned minus $520 recomputed credit earned).
    Example 2. (i) The facts are the same as in example 1 and in 
addition the item of section 38 property which became public utility 
property in 1972 is sold to Y Corporation on January 2, 1975.
    (ii) The actual useful life of such item of property is 6 years. For 
the first 3 years of its 8-year estimated useful life such item is 
treated as section 38 property which is not public utility property and 
for the remaining 3 years is treated as public utility property. The 
recomputed qualified investment with respect to such item of property is 
$5,714, computed as follows:

$12,000 basisx33\1/3\ percent applicable percentage...........    $4,000
$12,000 basisx \3/7\ x33\1/3\ percent applicable percentage...     1,714
                                                               ---------
    Total recomputed qualified investment.....................     5,714



X Corporation's recomputed credit earned for the taxable year 1969 is 
$400 (7 percent of $5,714). The income tax imposed by chapter 1 of the 
Code on X Corporation for the taxable year 1975 is increased by $120 
(that is, $440 ($840 original credit earned minus $400 recomputed credit 
earned) minus $320 increase in tax for 1969).

    (g) Special rules for progress expenditure property. Under section 
47(a)(3), a recapture determination is required if property ceases to be 
progress expenditure property (as defined in Sec. 1.46-5(d)). Property 
ceases to be progress expenditure property if it is sold or otherwise 
disposed of before it is placed in service. For example, cancellation of 
the contract for progress expenditure property or abandonment of the 
project by the taxpayer will be considered a ``disposition'' within the 
meaning of Sec. 1.47-2. A cessation occurs if progress expenditure 
property ceases to be property that will be section 38 property with a 
useful life of 7 years or more when placed in service. In general, a 
sale and leaseback is treated as a cessation. However, see paragraph 
(g)(2) of Sec. 1.47-3 for special rules for certain sale and leaseback 
transactions. Recapture determinations for progress expenditure property 
are to be made in a way similar to that provided under Secs. 1.47-1 
through 1.47-6. Reduction of qualified investment must begin with the 
most recent credit year (i.e., the most recent taxable year the property 
is taken into account in computing qualified investment under Sec. 1.46-
3 or 1.46-5).
    (h) Special rules for energy property--(1) In general. A recapture 
determination is required for the investment credit attributable to the 
energy percentage (energy credit) if property is (i) disposed of or (ii) 
otherwise ceases to be energy property (as defined in section 48(l)) 
with regard to the taxpayer before the close of the estimated useful 
life (as determined under paragraph (a)(2)(i) of this section) which was 
taken into account in computing qualified investment.
    (2) Dispositions. The term ``disposition'' is described in 
Sec. 1.47-2(a)(1). A transfer of energy property that is a 
``disposition'' requiring a recapture determination for the investment 
credit attributable to the regular percentage (regular credit) and the 
ESOP percentage (ESOP credit) will also be a ``disposition'' requiring a 
recapture determination for the energy credit.
    (3) Cessation. (i) The term ``cessation'' is described in Sec. 1.47-
2(a)(2). For energy property, a cessation occurs during a taxable year 
if, by reason of a change in use or otherwise, the property would not 
have qualified for an energy credit if placed in service during that 
year. A change in use will not require a recapture determination for the 
regular or ESOP credit unless, by reason of the change, the property 
would not have qualified for the regular or ESOP credit if placed in 
service during that year.
    (ii) A qualified intercity bus described in Sec. 1.48-9(q) must meet 
the predominant use test (of Sec. 1.48-9(q)(7)) for the remainder of the 
taxable year from the date it is placed in service and for each taxable 
year thereafter. A cessation occurs in any taxable year in which the bus 
is no longer a qualifying bus under Sec. 1.48-9(q)(6). A qualified 
intercity bus does not cease to be energy property for a taxable year 
subsequent to the one in which it was placed in service by reason of a 
decrease in operating capacity (see Sec. 1.48-9(q)(9)) for that year 
compared to any prior taxable year.
    (4) Recordkeeping requirement. For recordkeeping requirements with 
respect to dispositions or cessations, the rules of paragraph (e)(1) of 
this section apply. For example, the taxpayer must

[[Page 302]]

maintain records for each recycling facility indicating the percentage 
of virgin materials used each year. See, Sec. 1.48-9(g)(5)(ii).
    (5) Examples. The following examples illustrate this paragraph (h).

    Example 1. (a) In 1980, corporation X, a calendar year taxpayer, 
acquires and places in service a computer that will perform solely 
energy conserving functions in connection with an existing industrial 
process. Assume the computer has a 10 year useful life and qualifies for 
both the regular and energy credits. In 1981, a change is made in the 
industrial process (within the meaning of Sec. 1.48-9(l)(2)). However, 
for 1981 the computer continues to perform solely energy conserving 
functions. In 1982, the computer ceases to perform energy conserving 
functions and begins to perform a production related function.
    (b) For 1981, a recapture determination is not required. For 1982, 
the entire energy credit must be recaptured, although none of the 
regular credit is recaptured. If in 1989 the computer first ceased to 
perform an energy conserving function, no part of the energy credit 
would be recaptured.
    Example 2. Assume the same facts and conclusion as in example 1. 
Assume further that X sells the computer in 1985. A recapture 
determination is required for the regular credit.
    Example 3. In 1981, corporation Y, a calendar year taxpayer, 
acquires and places in service recycling equipment. Assume the equipment 
has a 7-year useful life and qualifies for both the regular credit and 
energy credit. During the course of 1982, more than 10 percent of the 
material recycled is virgin material. The energy credit is recaptured in 
its entirety, although none of the regular credit is recaptured. See 
Sec. 1.48-9(g)(5)(B)(ii).
    Example 4. In 1980, corporation Z, a calendar year taxpayer, 
acquires and places in service a boiler the primary fuel for which is an 
alternate substance. The boiler has a 7-year useful life. Assume the 
boiler is a structural component of a building within the meaning of 
Sec. 1.48-1(e)(2). Assume further that the boiler is not a part of a 
qualified rehabilitated building (as defined in section 48(g)(1)) or a 
single purpose agricultural or horticultural structure (as defined in 
section 48(p)). Z is allowed only an energy credit since the boiler is a 
structural component of a building. In 1984, Z modifies the boiler to 
use oil as the primary fuel. A recapture determination is required for 
the energy credit. See Sec. 1.48-9(c)(3).

    (i)-(l) [Reserved]
    (m) Commuter highway vehicles--(1) Recomputed qualified investment. 
(i) If a qualifying commuter highway vehicle (as defined in Sec. 1.46-
11(a) undergoes a change in use but does not cease to be section 38 
property, qualified investment for that vehicle is recomputed as if the 
vehicle was section 38 property which is not a qualifying commuter 
highway vehicle for its entire useful life.
    (ii) The following example illustrates this paragraph (m)(1).

    Example. X Corporation, a calendar year taxpayer, acquired and 
placed in service on January 1, 1982, a qualifying commuter highway 
vehicle with a basis of $10,000 and which qualified as three year 
recovery property under section 168(c)(2)(A)(i). The amount of qualified 
investment for the vehicle under section 46(c) (1) and (6) is $10,000. 
For the taxable year 1982, X Corporation's credit earned was $1,000 (10 
percent of $10,000) and X Corporation was allowed under section 38 a 
$1,000 credit against its 1982 tax liability. During the taxable year 
1984, the vehicle undergoes a change in use but does not cease to be 
section 38 property. The vehicle is treated as section 38 property which 
is not a qualifying commuter highway vehicle for its entire useful life. 
The recomputed qualified investment for the vehicle is $6,000 (60 
percent of $10,000) and X Corporation's recomputed credit earned is $600 
(10 percent of $6,000). The income tax imposed by chapter 1 of the Code 
on X Corporation for 1984 is increased by the $400 decrease in its 
credit earned for 1982 ($1,000-$600).

    (2) Change in use--(i) A qualifying commuter highway vehicle 
undergoes a change in use if the vehicle does not meet the commuter use 
requirement (as defined in Sec. 1.46-11(d)) for each computation period.
    (ii) Each of the following is a computation period:
    (A) The period beginning on the date the vehicle was placed in 
service and ending on the last day of the taxpayer's taxable year in 
which the vehicle was placed in service;
    (B) Each of the taxpayer's taxable years beginning after the date 
the vehicle was placed in service and ending before the end of the first 
36 months after the vehicle was placed in service; and
    (C) The period ending at the end of the first 36 months after the 
vehicle was placed in service and beginning on the first day of the 
taxpayer's taxable year in which the end of those first 36 months falls.
    (iii) The following example illustrates this paragraph (m)(2).


[[Page 303]]


    Example. (a) Z Corporation, a calendar year taxpayer, acquired and 
placed in service a qualifying commuter highway vehicle on January 15, 
1979. Z Corporation used the vehicle as set forth in the following 
table:

------------------------------------------------------------------------
                                           Total     Commuter
          Taxable year ending              miles       miles      Ratio
------------------------------------------------------------------------
1979...................................     10,000       9,000       .90
1980...................................     10,000       8,000       .80
1981...................................     10,000       8,000       .80
1982 (1-14)............................      1,000         100       .10
------------------------------------------------------------------------

    (b) The first computation period begins on the date the vehicle is 
placed in service, in this example 1-15-79, and ends 12-31-79. In that 
computation period, the ratio of commuter miles to total miles is .90 
(9,000 miles/10,000 miles). Therefore, the vehicle meets the commuter 
use requirement for that period and has not undergone a change in use. 
Similar calculations for the computation periods 1-1-80 to 12-31-80 and 
1-1-81 to 12-31-81 produce the same result.
    (c) As of the computation period beginning 1-1-82 and ending 1-14-
82, the ratio of commuter use to total mileage is .10 (100 miles /1,000 
miles). Since that ratio is less than .80, the vehicle does not meet the 
commuter use requirement for the period and the vehicle has undergone a 
change in use.

(Secs. 38(b) (76 Stat. 963, 26 U.S.C. 38(b)), 48(l)(16) (94 Stat. 264, 
26 U.S.C. 48(l)(16)), and 7805 (68A Stat. 917, 26 U.S.C. 7805))

[T.D. 6931, 32 FR 14027, Oct. 10, 1967, as amended by T.D. 7203, 37 FR 
17127, Aug. 25, 1972; T.D. 7765, 46 FR 7291, Jan. 23, 1981; T.D. 7982, 
49 FR 39541, Oct. 9, 1984; T.D. 8035, 50 FR 29370, July 19, 1985; T.D. 
8183, 53 FR 6625, Mar. 2, 1988; T.D. 8474, 58 FR 25557, Apr. 27, 1993]