[Code of Federal Regulations]
[Title 26, Volume 5]
[Revised as of April 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 26CFR1.401(l)-5]

[Page 347-353]
 
                       TITLE 26--INTERNAL REVENUE
 
    CHAPTER I--INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY 
                               (CONTINUED)
 
PART 1_INCOME TAXES--Table of Contents
 
Sec. 1.401(l)-5  Overall permitted disparity limits.

    (a) Introduction--(1) In general. The maximum excess allowance and 
maximum offset allowance limit the disparity that can be provided under 
a plan for a plan year. The overall permitted disparity rules apply to 
limit the disparity provided for a plan year if an employee benefits 
under more than one plan maintained by the employer (the ``annual 
overall permitted disparity limit'') and to limit the disparity provided 
for an employee's total years of service, either in a single plan or in 
more than one plan of the employer (the ``cumulative overall permitted 
disparity limit''). The overall permitted disparity rules take into 
account the disparity provided under a section 401(l) plan and the 
permitted disparity imputed under a plan that satisfies section 
401(a)(4) by relying on Sec. 1.401(a)(4)-7. A plan that is not a 
section 401(l) plan is generally deemed to impute permitted disparity 
under Sec. 1.401(a)(4)-7 unless established otherwise. Paragraph (b) of 
this section provides rules on the annual overall permitted disparity 
limit. Paragraph (c) of this section provides rules on the cumulative 
overall permitted disparity limit.
    (2) Plan requirements. In order to satisfy section 401(l), a plan 
must provide that the overall permitted disparity limits may not be 
exceeded and must specify how employer-provided contributions or 
benefits under the plan are adjusted, if necessary, to satisfy the 
overall permitted disparity limits. Any adjustments made to satisfy the 
overall permitted disparity limits must be made in a uniform manner for 
all employees.
    (3) Plans taken into account. For purposes of this section, all 
plans of the employer are taken into account. In addition, all plans of 
any other employer are taken into account for all periods of service 
with the other employer for which the employee receives credit for 
purposes of benefit accrual under any plan of the current employer.
    (b) Annual overall permitted disparity limit--(1) In general. If, in 
the plan year, an employee benefits under more than one plan, the annual 
overall permitted disparity limit is satisfied only if the employee's 
total annual disparity fraction, as defined in paragraph (b)(2) of this 
section, does not exceed one. Paragraphs (b)(3) through (b)(8) of this 
section explain the determination of an employee's annual disparity 
fractions. Paragraph (b)(9) of this section provides examples.
    (2) Total annual disparity fraction. An employee's total annual 
disparity fraction is the sum of the employee's annual disparity 
fractions, as defined in paragraphs (b)(3) through (b)(7) of this 
section. An employee's total annual disparity fraction is determined as 
of the end of the current plan year, based on the employee's annual 
disparity fractions under all plans with plan years ending in the 
current plan year.
    (3) Annual defined contribution plan disparity fraction. For a plan 
year, the annual defined contribution plan disparity fraction for an 
employee benefiting under a defined contribution plan that is a section 
401(l) plan is a fraction--
    (i) The numerator of which is the disparity provided under the plan 
for the plan year, and
    (ii) The denominator of which is the maximum excess allowance under 
Sec. 1.401(l)-2(b)(2) for the plan year.
    (4) Annual defined benefit excess plan disparity fraction. For a 
plan year, the annual defined benefit excess plan disparity fraction for 
an employee benefiting under a defined benefit excess plan that is a 
section 401(l) plan is a fraction--
    (i) The numerator of which is the disparity provided under the plan 
for the plan year, and

[[Page 348]]

    (ii) The denominator of which is the maximum excess allowance under 
Sec. 1.401(l)-3(b)(2) for the plan year.
    (5) Annual offset plan disparity fraction--(i) In general. For a 
plan year, the annual offset plan disparity fraction for an employee 
benefiting under an offset plan that is a section 401(l) plan is a 
fraction--
    (A) The numerator of which is the disparity provided under the plan 
for the plan year; and
    (B) The denominator of which is the maximum offset allowance under 
Sec. 1.401(l)-3(b)(3) for the plan year.
    (ii) PIA offset plans. In the case of an offset plan that applies an 
offset of a specified percentage of the employee's PIA, as permitted 
under Sec. 1.401(l)-3(c)(2)(ix), the numerator of the annual offset 
plan disparity fraction is the offset percentage used in the section 
401(l) overlay under the plan.
    (6) Annual imputed disparity fraction. For a plan year, the annual 
imputed disparity fraction for an employee benefiting under a plan that 
imputes permitted disparity with respect to the employee under Sec. 
1.401(a)(4)-7 is one.
    (7) Annual nondisparate fraction. For a plan year, the annual 
nondisparate fraction for an employee benefiting under a plan that 
neither is a section 401(l) plan nor imputes permitted disparity under 
Sec. 1.401(a)(4)-7 is zero.
    (8) Determination of fraction--(i) General rule. A separate annual 
disparity fraction is generally determined for each plan under which the 
employee benefits. Thus, for example, if two plans are aggregated and 
treated as a single plan for purposes of section 401(a)(4), a single 
annual disparity fraction applies to the aggregated plan.
    (ii) Multiple formulas. If a plan provides an allocation or benefit 
equal to the sum of two or more formulas, each formula is considered a 
separate plan for purposes of this section. If a plan provides an 
allocation or benefit equal to the greater of two or more formulas, an 
annual disparity fraction is calculated for the employee under each 
formula and the largest of the fractions is the employee's annual 
disparity fraction under the plan.
    (iii) Offset arrangements--(A) In general. If an employee benefits 
under two plans taken into account under paragraph (a)(3) of this 
section as described in paragraph (b)(8)(iii)(B) or (C) of this section, 
the employee's annual disparity fraction under both plans is the larger 
of the annual disparity fractions calculated separately under each plan.
    (B) Defined benefit plans. The employee's employer-provided accrued 
benefit under a defined benefit plan is offset by the employee's total 
employer-provided accrued benefit under another defined benefit plan or 
by the actuarial equivalent (as defined in Sec. 1.401(a)(4)-12) of the 
employee's total account balance under a defined contribution plan that 
is attributable to employer contributions.
    (C) Defined contribution plans. The amount allocated to the 
employee's account under a defined contribution plan is offset by the 
total amount allocated to the employee's account under another defined 
contribution plan.
    (iv) Applicable percentages. The disparity provided under a plan is 
determined on the base and excess percentages under an excess plan and 
the offset percentage under an offset plan, regardless of whether the 
employee's plan year or average annual compensation exceeds the 
integration or offset level under the plan.
    (v) Fractional accrual plans. If a section 401(l) plan determines 
each employee's accrued benefit under the fractional accrual method of 
section 411(b)(1)(C), the numerator of an employee's annual disparity 
fraction is based on the disparity provided in the benefit accrued for 
the employee for the plan year.
    (9) Examples. The following examples illustrate this paragraph (b). 
Except as otherwise provided, each plan is a section 401(l) plan.

    Example 1. (a) Employee A benefits for the plan year under a defined 
contribution excess plan, Plan X, and a defined benefit excess plan, 
Plan Y, of the employer. Plans X and Y have the same plan year. Employee 
A benefits under no other plan of the employer for the plan year of any 
other plan ending in the plan year of Plans X and Y. Plan X provides a 
base contribution percentage of 5 percent and an excess contribution 
percentage of 7 percent, thus providing Employee A with disparity of 2 
percent for the plan year. The maximum excess allowance for the plan 
year under Plan X is 5 percent. Plan Y provides a base benefit 
percentage of 1 percent and an

[[Page 349]]

excess benefit percentage of 1.35 percent, thus providing Employee A 
with disparity of 0.35 percent for the plan year. The maximum excess 
allowance for the plan year under Plan Y is 0.75 percent.
    (b) Employee A's annual defined contribution plan disparity fraction 
under Plan X for the plan year is 0.4 (2 percent divided by 5 percent). 
Employee A's annual defined benefit excess plan disparity fraction under 
Plan Y for the plan year is 0.47 (0.35 percent divided by 0.75 percent). 
Employee A's total annual disparity fraction is the sum of 0.4 and 0.47 
or 0.87. Because Employee A's total annual disparity fraction does not 
exceed one, the plans satisfy the annual overall permitted disparity 
limit with respect to Employee A for the plan year.
    Example 2. (a) The facts are the same as in Example 1, except that 
Plan Y is a defined contribution plan, rather than a defined benefit 
plan. Plan X and Plan Y cover the same employees and are identical in 
their terms except for the base and excess contribution percentages 
provided under the plans. Plan Y provides a base contribution percentage 
of 3 percent and an excess contribution percentage of 6 percent, thus 
providing Employee A with disparity of 3 percent for the plan year. The 
maximum excess allowance for the plan year under Plan Y is 3 percent.
    (b) Employee A's annual defined contribution plan disparity fraction 
under Plan X for the plan year is 0.4 (2 percent divided by 5 percent). 
Employee A's annual defined contribution plan disparity fraction under 
Plan Y for the plan year is 1 (3 percent divided by 3 percent). Because 
Employee A's total annual disparity fraction (the sum of 0.4 and 1 or 
1.4) exceeds one, the plans do not satisfy the annual overall permitted 
disparity requirements with respect to Employee A for the plan year.
    (c) Plan X and Plan Y are aggregated for purposes of section 
401(a)(4) and form a single section 401(l) plan. Under the plan, the 
base contribution percentage is 8 percent (5 percent plus 3 percent), 
and the excess contribution percentage is 13 percent (7 percent plus 6 
percent). A single annual defined contribution plan disparity fraction 
is determined for Employee A for the plan year, the numerator of which 
is the disparity of 5 percent provided under the plan (13 percent minus 
8 percent), and the denominator of which is 5.7 percent, the maximum 
excess allowance that applies to the plan. Because Employee A's only 
annual disparity fraction of 0.88 (5 percent divided by 5.7 percent) 
does not exceed one, Employee A's total annual disparity fraction also 
does not exceed one. The plan thus satisfies the annual overall 
permitted disparity limit with respect to Employee A for the plan year.
    Example 3. Assume the same facts as in Example 2, except that Plan X 
and Plan Y use different integration levels. Therefore, when Plan X and 
Plan Y are aggregated to form a single plan for purposes of section 
401(a)(4), the single plan does not satisfy section 401(l). In applying 
the general test of Sec. 1.401(a)(4)-2(c), the plan imputes disparity 
under Sec. 1.401(a)(4)-7. Employee A's only annual disparity fraction 
is the annual imputed disparity fraction of one. Employee A's total 
annual disparity fraction is also one, and the plan satisfies the annual 
overall permitted disparity limit with respect to Employee A for the 
plan year.
    Example 4. (a) Employee B participates in two plans: Plan M, which 
is a section 401(l) plan, and Plan N, which is subject to the general 
test under Sec. 1.401(a)(4)-3(c). Plan M provides that the disparity 
provided an employee for the plan year will be reduced to the extent 
necessary to satisfy the annual overall permitted disparity limits. The 
employer wishes to impute permitted disparity under Sec. 1.401(a)(4)-7 
in order for Plan N to satisfy section 401(a)(4). Employee B's imputed 
disparity fraction under Plan N is therefore one, and Plan M provides no 
disparity for Employee B for the plan year. As a result, Plan M provides 
disparity that is neither uniform nor deemed uniform under Sec. 
1.401(l)-3(c); Plan M therefore does not satisfy section 401(l).
    (b) Assume instead that Plan M provides that the annual overall 
permitted disparity limits must be satisfied without reducing the 
disparity provided for an employee under Plan M, thus requiring a 
reduction in the employee's annual disparity fraction under another 
plan. In that case, the disparity provided under Plan M would be uniform 
for the plan year and Plan M would continue to satisfy section 401(l). 
However, imputation of permitted disparity with respect to Employee B 
would not be allowed under Plan N.

    (c) Cumulative permitted disparity limit--(1) In general--(i) 
Employees who benefit under defined benefit plans. In the case of an 
employee who has benefited under one or more defined benefit plans for a 
plan year described in paragraph (c)(1)(v) of this section, the 
cumulative permitted disparity limit is satisfied if the employee's 
cumulative disparity fraction, as defined in paragraph (c)(2) of this 
section, does not exceed 35.
    (ii) Employees who do not benefit under defined benefit plans. In 
the case of an employee who has not benefited under a defined benefit 
plan for any plan year described in paragraph (c)(1)(v) of this section, 
the cumulative permitted disparity limit is satisfied.
    (iii) Certain plan years disregarded. For purposes of this paragraph 
(c), an

[[Page 350]]

employee is not treated as benefiting under a defined benefit plan for a 
plan year described in paragraph (c)(1)(v) of this section if the 
employer can establish that for that plan year the defined benefit plan 
was not a section 401(l) plan and did not impute permitted disparity 
under Sec. 1.401(a)(4)-7.
    (iv) Determination of type of plan. For purposes of this paragraph 
(c), a target benefit plan that relies on the special rule of Sec. 
1.401(a)(4)-8(b)(3) to satisfy section 401(a)(4) and a DB/DC plan within 
the meaning of Sec. 1.401(a)(4)-9(a) are treated as defined benefit 
plans. Similarly, a cash balance plan that relies on the special rule of 
Sec. 1.401(a)(4)-8(c)(3) to satisfy section 401(a)(4) is treated as a 
defined contribution plan.
    (v) Applicable plan years. In applying paragraphs (c)(1) (i), (ii), 
and (iii) of this section, for purposes of determining whether an 
employee benefits under a defined benefit plan, the applicable plan 
years are all plan years that begin on or after the regulatory effective 
date, as set forth in Sec. 1.401(l)-6(b), or, in the case of 
governmental plans, as set forth in Sec. 1.401(a)(4)-13(b).
    (vi) Transition rule for defined contribution plans. A defined 
contribution plan is deemed to satisfy the cumulative permitted 
disparity limit for the first plan year to which these regulations 
apply, as set forth in Sec. 1.401(l)-6(b), or, in the case of 
governmental plans, as set forth in Sec. 1.401(a)(4)-13(b).
    (2) Cumulative disparity fraction. An employee's cumulative 
disparity fraction is the sum of the employee's total annual disparity 
fractions, as defined in paragraph (b)(2) of this section, attributable 
to the employee's total years of service under all plans.
    (3) Determination of total annual disparity fractions for prior 
years. For each of the employee's years of service credited as of the 
end of the last plan year beginning before January 1, 1989, not to 
exceed 35, under all plans as of that time that are taken into account 
under paragraph (a)(3) of this section (whether or not terminated), the 
employee's total annual disparity fraction is one. Therefore, if, before 
the first plan year beginning on or after January 1, 1989, an employee 
never participated in or benefited under any plan taken into account 
under paragraph (a)(3) of this section, the employee's total annual 
disparity fractions are determined without regard to this paragraph 
(c)(3). An employer may apply the rule in this paragraph (c)(3) with 
respect to all employees, using a year (including the current year) that 
is chosen by the employer and is later than 1989. Thus, for example, in 
lieu of calculating annual disparity fractions for all plan years, the 
employer may assume that the full disparity limit has been used in each 
prior plan year for which an employee has been credited with a year of 
service.
    (4) Special rules for greater of formulas and offset arrangements--
(i) Greater of formulas--(A) In general. A defined benefit plan that is 
a section 401(l) plan and that provides a benefit equal to the greater 
of the benefits determined under two or more formulas is deemed to 
satisfy the cumulative permitted disparity limit with respect to an 
employee if each of the requirements in paragraphs (c)(4)(i) (B) and (C) 
of this section is satisfied. For this purpose, a plan that uses a 
fresh-start formula that determines the accrued benefit as the greater 
of two amounts under Sec. 1.401(a)(4)-13(c)(4) (ii) or (iii) provides a 
benefit equal to the greater of the benefits determined under two or 
more formulas.
    (B) Separate satisfaction by formulas. Each formula under the plan 
would satisfy the cumulative permitted disparity limit if it were the 
only formula under the plan. In the case of a current formula that 
applies to the employee's total years of service (as, for example, under 
Sec. 1.401(a)(4)-13(c)(4) (ii)(B) or (iii)(B)), for purposes of 
determining whether that formula would satisfy the cumulative permitted 
disparity limit if it were the only formula under the plan, the special 
rule for prior years under paragraph (c)(3) of this section may be 
disregarded.
    (C) Single plan. The employee has never benefited under another plan 
taken into account under paragraph (a)(3) of this section that is a 
section 401(l) plan or that satisfies section 401(a)(4) by relying on 
Sec. 1.401(a)(4)-7. For this purpose, if the benefit under the plan is 
offset in an offset arrangement described in paragraph (b)(8)(iii)(B) of 
this section, the other

[[Page 351]]

plan is disregarded. In addition, a plan does not fail the requirements 
of this paragraph (c)(4)(i)(C) merely because the employee benefits 
under another defined benefit plan, provided that--
    (1) With respect to each benefit formula under the plan, no years of 
service taken into account under that benefit formula are taken into 
account under a benefit formula of the other plan; and
    (2) Paragraph (c)(4)(i)(B) of this section would be satisfied if the 
plans were treated as a single plan that provided a benefit equal to the 
greater of the benefits provided under two or more formulas. For this 
purpose, a formula consists of the sum of a formula for the years of 
service taken into account under one plan and a formula for the years of 
service taken into account under the other plan. Thus, each possible 
combination of the formulas under the plans must satisfy paragraph 
(c)(4)(i)(B) of this section.
    (ii) Offset arrangements--(A) In general. If a defined benefit plan 
is a section 401(l) plan and the benefit under the plan (the gross 
benefit plan) is offset by the benefit under another plan (the 
offsetting plan) in an offset arrangement described in paragraph 
(b)(8)(iii)(B) of this section, the gross benefit plan is deemed to 
satisfy the cumulative permitted disparity limit with respect to an 
employee if each of the requirements in paragraphs (c)(4)(ii) (B) and 
(C) of this section is satisfied.
    (B) Separate satisfaction by plans. This requirement is satisfied if 
the gross benefit plan would satisfy the cumulative disparity limit if 
no offset applied, and the offsetting plan satisfies the cumulative 
permitted disparity limit, not taking into account the gross benefit 
plan.
    (C) No other plan. Except for the plans in the offset arrangement, 
the employee has never benefited under another plan taken into account 
under paragraph (a)(3) of this section that is a section 401(l) plan or 
that satisfies section 401(a)(4) by relying on Sec. 1.401(a)(4)-7. An 
offset arrangement does not fail the requirements of this paragraph 
(c)(4)(ii)(C) merely because the employee benefits under another defined 
benefit plan, provided no years of service taken into account under a 
benefit formula of any plan in the offset arrangement are also taken 
into account under a benefit formula of the other plan.
    (5) Examples. The following examples illustrate this paragraph (c). 
In each example the plan is noncontributory and, unless provided 
otherwise, is the only plan ever maintained by the employer. Each plan 
uses a normal retirement age of 65 and contains no provision that would 
require a reduction in the 0.75-percent factor under Sec. 1.401(l)-
3(b)(2) or (3). Each example discusses the benefit formula applicable to 
an employee who has a social security retirement age of 65.

    Example 1. Plan M is a defined benefit excess plan that provides a 
normal retirement benefit of 1 percent of average annual compensation up 
to covered compensation, plus 1.75 percent of average annual 
compensation above covered compensation, for each year of service 
without limit. The disparity provided under the plan for the plan year 
is 0.75 percent, the excess benefit percentage of 1.75 percent minus the 
base benefit percentage of 1 percent. The maximum excess allowance for 
the plan year is 0.75 percent. Thus, each employee's annual defined 
benefit excess plan disparity fraction under the plan for each plan year 
is one. Because the plan contains no limit on the years of service taken 
into account under the plan, the sum of the total annual disparity 
fractions for a potential employee with more than 35 years of service 
will exceed 35. In addition, the plan does not provide that the overall 
permitted disparity limits may not be exceeded as required by paragraph 
(a)(2) of this section. The plan therefore does not satisfy the 
cumulative permitted disparity limit of this paragraph (c).
    Example 2. Plan N is an offset plan that provides a normal 
retirement benefit of 2 percent of average annual compensation, minus 
0.75 percent of final average compensation up to the lesser of covered 
compensation and average annual compensation, for each year of service 
up to 35. The disparity provided under the plan for the plan year is 
0.75 percent, the offset percentage. The maximum offset allowance for 
the plan year is 0.75 percent. Thus, each employee's annual offset plan 
disparity fraction under the plan for each plan year is one. Because the 
plan limits the years of service taken into account under the plan to 
35, the sum of the total annual disparity fractions for an employee 
cannot exceed 35. The plan therefore satisfies the cumulative permitted 
disparity limit of this paragraph (c).

[[Page 352]]

    Example 3. Plan O is a defined benefit excess plan that provides a 
normal retirement benefit of 0.75 percent of average annual compensation 
up to covered compensation, plus 1.25 percent of average annual 
compensation above covered compensation, for each year of service up to 
45. The disparity provided under the plan for the plan year is 0.5 
percent, the excess benefit percentage of 1.25 percent minus the base 
benefit percentage of 0.75 percent. The maximum excess allowance for the 
plan year is 0.75 percent. Thus, each employee's annual defined benefit 
excess plan disparity fraction under the plan for each plan year is 0.67 
(0.5 percent divided by 0.75 percent). Because the plan limits the years 
of service taken into account under the plan to 45, the sum of the total 
annual disparity fractions for an employee cannot exceed 30 (0.67x45). 
The plan therefore satisfies the cumulative permitted disparity limit of 
this paragraph (c).
    Example 4. (a) Plan P is a defined contribution excess plan. Plan P 
provides a base contribution percentage of 6 percent and an excess 
contribution percentage of 11.7 percent, thus providing disparity of 5.7 
percent for the plan year. Because the maximum excess allowance for each 
plan year under Plan P is 5.7 percent, each employee's annual defined 
contribution plan disparity fraction under Plan P for each plan year is 
one. Plan Q is a defined benefit excess plan maintained by the same 
employer. Plan Q provides a base benefit percentage of 1 percent and an 
excess benefit percentage of 1.75 percent for each year of service up to 
35, thus providing disparity of 0.75 percent for the plan year. Because 
the maximum excess allowance for each plan year under Plan Q is 0.75 
percent, each employee's annual defined benefit excess plan disparity 
fraction under Plan Q for each plan year is one.
    (b) Employee A benefits under Plan P for the 1980 through the 1994 
plan years. The sum of Employee A's total annual disparity fractions 
under Plan P is 15. (Under paragraph (c)(3)(i) of this section, Employee 
A's annual disparity fraction for each year of service as of the end of 
the 1988 plan year is one.) As of the 1995 plan year, Employee A no 
longer benefits under Plan P and begins to benefit under Plan Q for the 
first time. In order to satisfy the cumulative permitted disparity limit 
of this paragraph (c), Plan Q must provide that no disparity will be 
provided if the sum of an employee's total annual disparity fractions 
reaches 35, taking into account the employee's annual defined 
contribution plan disparity fractions under Plan P as well as the 
employee's annual defined benefit excess plan disparity fractions under 
Plan Q. Thus, after Employee A has benefited under Plan Q for 20 years, 
Plan Q may not provide any disparity in additional benefits accrued for 
Employee A.
    Example 5. (a) Plan O is a noncontributory defined benefit excess 
plan. Plan O provides an employee whose social security retirement age 
is 65 with the greater of the benefits determined under two formulas. 
The first formula provides a benefit of 1 percent of average annual 
compensation up to covered compensation, plus 1.75 percent of average 
annual compensation above covered compensation, for each year of service 
up to 35. The second formula provides a benefit of 1 percent of average 
annual compensation up to covered compensation, plus 1.6 percent of 
average annual compensation above covered compensation, for each year of 
service up to 40.
    (b) Under paragraph (b)(4) of this section, an employee's annual 
defined benefit excess plan fraction for each of the 35 years under the 
first formula is 0.75/0.75 or one, and an employee's annual defined 
benefit excess plan fraction for each of the 40 years under the second 
formula is 0.6/0.75 or 0.8. Under paragraph (b)(8)(ii) of this section, 
an employee's annual defined benefit excess plan fraction (and total 
annual disparity fraction because the employee benefits only under Plan 
O) for the plan year is the larger fraction under the two formulas or 
one. Therefore, after 35 years, the employee has a cumulative disparity 
fraction of 35. The disparity provided under the second formula for 
years of service after 35 thus exceeds the cumulative permitted 
disparity limit unless the plan qualifies for the special rule in 
paragraph (c)(4)(i) of this section.
    (c) Assume the condition in paragraph (c)(4)(i)(C) of this section 
is satisfied because no employee has benefited under another plan taken 
into account under paragraph (a)(3) of this section. In addition, the 
largest cumulative disparity fraction possible under the first formula 
is 35 times one or 35, and the largest cumulative disparity fraction 
possible under the second formula is 40 times 0.8 or 32. Thus, the 
requirement of paragraph (c)(4)(i)(B) of this section is also satisfied 
because each formula would satisfy the cumulative permitted disparity 
limit if it were the only formula under the plan. Under paragraph 
(c)(4)(i) of this section, the plan is deemed to satisfy the cumulative 
permitted disparity limit with respect to an employee whose social 
security retirement age is 65.

    (d) Additional rules. The Commissioner may prescribe additional 
rules under this section as the Commissioner considers appropriate. 
Additional rules may include (without being limited to) rules for 
computing the fractions described in this section with respect to 
terminated plans, rules for applying the overall permitted disparity 
limits to employees who benefit under plans maintained by railroad 
employers, and

[[Page 353]]

rules for determining which plans do not satisfy section 401(l) if the 
overall permitted disparity limits are exceeded.

[T.D. 8359, 56 FR 47634, Sept. 19, 1991; 57 FR 10819, 10952, Mar. 31, 
1992, as amended by T.D. 8486, 58 FR 46833, Sept. 3, 1993]