; and (3) update other regulations, as necessary, to ensure that, with respect to catalytic converters, the requirements of section 541.5 and part 543 of title 49, Code of Federal Regulations (as revised in accordance with paragraphs (1) and (2), respectively), apply to any vehicle covered by part 565 of that title (or successor regulations). (b) Application Notwithstanding any provision of chapter 331 of title 49, United States Code, in the case of a vehicle described in section 565.2 of title 49, Code of Federal Regulations (or a successor regulation), that has not been sold to the first purchaser (as defined in section 33101 of title 49, United States Code), the requirements added to section 541.5 of title 49, Code of Federal Regulations (or a successor regulation), by the Administrator in accordance with paragraph (1) of subsection (a) shall apply to the vehicle beginning on the date that is 180 days after the date on which the Administrator makes the revisions and updates required by that subsection, regardless of the model year of the vehicle or the date on which the vehicle is manufactured. (c) Marking of catalytic converters notwithstanding an exemption Section 33106 of title 49, United States Code, is amended— (1) in subsection (c)— (A) in paragraph (2), by striking and at the end; (B) by redesignating paragraph (3) as paragraph (4); and (C) by inserting after paragraph (2) the following: (3) a certification that the catalytic converter will be marked in accordance with sections 33101 through 33104, including associated regulations; and