; and (D) the term operational design domain means the specific conditions under which a given driving automation system or feature thereof is designed to function. (2) Revisions to certain definitions (A) If SAE International (or its successor organization) revises the definition of any of the terms defined in subparagraph (A), (B), or (D) of paragraph (1) in Recommended Practice Report J3016, it shall notify the Secretary of the revision. The Secretary shall publish a notice in the Federal Register to inform the public of the new definition unless, within 90 days after receiving notice of the new definition and after opening a period for public comment on the new definition, the Secretary notifies SAE International (or its successor organization) that the Secretary has determined that the new definition does not meet the need for motor vehicle safety, or is otherwise inconsistent with the purposes of chapter 301 of title 49, United States Code. If the Secretary so notifies SAE International (or its successor organization), the existing definition in paragraph (1) shall remain in effect. (B) If the Secretary does not reject a definition revised by SAE International (or its successor organization) as described in subparagraph (A), the Secretary shall promptly make any conforming amendments to the regulations and standards of the Secretary that are necessary. The revised definition shall apply for purposes of this section. The requirements of section 553 of title 5, United States Code, shall not apply to the making of any such conforming amendments. (C) Pursuant to section 553 of title 5, United States Code, the Secretary may update any of the definitions in subparagraph (A), (B), or (D) of paragraph (1) if the Secretary determines that materially changed circumstances regarding highly automated vehicles have impacted motor vehicle safety such that the definitions need to be updated to reflect such circumstances.