[Code of Federal Regulations] [Title 26, Volume 16] [Revised as of April 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 26CFR41.4482(a)-1] [Page 16] TITLE 26--INTERNAL REVENUE CHAPTER I--INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) PART 41_EXCISE TAX ON USE OF CERTAIN HIGHWAY MOTOR VEHICLES--Table of Contents Subpart B_Tax on Use of Certain Highway Motor Vehicles Sec. 41.4482(a)-1 Definition of highway motor vehicle. (a) Highway motor vehicle. The term ``highway motor vehicle'' means any vehicle that is both: (1) A vehicle propelled by means of its own motor, whether such motor is powered by gasoline, diesel fuel, special motor fuels, electricity, or otherwise, and (2) A ``highway vehicle'' as defined in Sec. 48.4061(a)-1(d) of this chapter. (b) Treatment of certain excluded vehicles. Although trailers and semitrailers used in combination with highway trucks or truck-tractors are not vehicles the use of which is subject to the tax imposed by section 4481(a), trailers and semitrailers customarily used in combination with highway trucks or truck-tractors are taken into account in determining the taxable gross weight of the highway motor vehicle under Sec. 41.4482(b)-1, which is the base of the tax. [T.D. 7461, 42 FR 2671, Jan. 13, 1977, as amended by T.D. 8879, 65 FR 17153, Mar. 31, 2000]