; and (B) the Administrator shall— (i) issue such regulations as the Administrator deems necessary to bring greenhouse gas emissions from covered fuels subject to taxation under section 9902 of the Internal Revenue Code of 1986 to levels that are at or below the emission reductions targets in section 9903(a)(2) of such Code; and (ii) require in such regulations that additional reductions in greenhouse gas emissions are achieved to fully compensate for any amount by which greenhouse gas emissions from covered fuels subject to taxation under section 9902 of such Code have exceeded the targets in section 9903(a)(2) of such Code. (2) Deadline for finalizing regulations The Administrator shall finalize any regulations required by paragraph (1) not later than two years after the Administrator makes the relevant determination pursuant to such paragraph. (3) Achievement of additional reductions Regulations issued pursuant to paragraph (1) shall ensure that any additional reductions required by paragraph (1)(B)(ii) are fully achieved by no later than eight years after the Administrator makes the determination pursuant to subsection (e)(1) described in paragraph (1). (g) Definitions In this section, the terms greenhouse gas and greenhouse gas effects have the meanings given to those terms in section 9901 of the Internal Revenue Code of 1986. . (b) New motor vehicles and new motor vehicle engines Section 202(b) of the Clean Air Act ( 42 U.S.C. 7521(b) ) is amended— (1) by redesignating the second paragraph (3) (as redesignated by section 230(4)(C) of Public Law 101–549 (104 Stat. 2529)) as paragraph (4)