Administration

Section 301 of the Clean Air Act (42 U.S.C. 7601) is amended— (1) by striking the section designation and heading and all that follows through The Administrator in the first sentence of subsection (a)(1) and inserting the following: 301. Administration (a) Regulatory authority (1) In general Subject to paragraph (3), the Administrator; and (2) in subsection (a)— (A) in paragraph (2)— (i) by striking (2) Not later than and inserting the following: (2) Regional offices Not later than; and (ii) by indenting subparagraphs (A) through (C) appropriately; and (B) by adding at the end the following: (3) Limitations on regulations Nothing in this Act authorizes the Administrator to prescribe any regulations, including the granting of a waiver or authorization otherwise authorized under this Act, if the regulation can reasonably be determined to— (A) restrict or in effect restrict the sale or use of any type of vehicle or engine, including a new motor vehicle with an internal combustion engine (as defined in section 63.9375 of title 40, Code of Federal Regulations (as in effect on January 1, 2026)); (B) require or necessitate fuel-switching at a power plant; (C) reduce the reliability of the electric grid; (D) require or necessitate the use of a technology that is— (i) commercially unavailable; (ii) cost-prohibitive or unachievable independent of any subsidies, including any subsidies provided directly or indirectly to cover the cost of the technology or to demonstrate the feasibility of the technology; (iii) infeasible due to factors beyond the control of the entity to which the regulation would apply, including but not limited to geographic, geologic, or climatic factors, or the lack of critical enabling infrastructure; or (iv) otherwise technically, economically, or practically infeasible; or (E) otherwise significantly expand the authority of the Administrator beyond the intent of Congress..