26 U.S.C. § 4082: Exemptions for diesel fuel and kerosene

which the Secretary determines is destined for a nontaxable use, which is indelibly dyed by mechanical injection in accordance with regulations which the Secretary shall prescribe, and which meets such marking requirements (if any) as may be prescribed by the Secretary in regulations. any use which is exempt from the tax imposed by section 4041(a)(1) other than by reason of a prior imposition of tax, any use in a train, and any use described in section 4041(a)(1)(C)(iii)(II). removed, entered, or sold in a State for ultimate sale or use in an area of such State during the period such area is exempted from the fuel dyeing requirements under subsection (i) of section 211 of the Clean Air Act (as in effect on the date of the enactment of this subsection) by the Administrator of the Environmental Protection Agency under paragraph (4) of such subsection (i) (as so in effect), and the use of which is certified pursuant to regulations issued by the Secretary. received by pipeline or vessel for use by the person receiving the kerosene in the manufacture or production of any substance (other than gasoline, diesel fuel, or special fuels referred to in section 4041), or for such a use by the person removing or entering the kerosene, or for resale by such person for such a use by the purchaser, is registered under section 4101 with respect to the tax imposed by section 4081 on kerosene, and sells kerosene exclusively to ultimate vendors described in section 6427( l )(5)(B) with respect to kerosene. the rate of tax under section 4081(a)(2)(A)(iii) shall be zero, and if such aircraft is employed in foreign trade or trade between the United States and any of its possessions, the increase in such rate under section 4081(a)(2)(B) shall be zero. Subsection (a) shall not apply to the tax imposed under section 4081 at the Leaking Underground Storage Tank Trust Fund financing rate. Paragraph (1) shall not apply with respect to any fuel if the Secretary determines that such fuel is destined for export or for use by the purchaser as supplies for vessels (within the meaning of section 4221(d)(3)) employed in foreign trade or trade between the United States and any of its possessions. The Secretary shall prescribe such regulations as may be necessary to carry out this section, including regulations requiring the conspicuous labeling of retail diesel fuel and kerosene pumps and other delivery facilities to assure that persons are aware of which fuel is available only for nontaxable uses. For tax on train and certain bus uses of fuel purchased tax-free, see subsections (a)(1) and (d)(3) of section 4041.