; and (bb) installed not later than 1 year after the effective date of the regional standard. . 1206. Modifying product definitions (a) Authority to modify definitions (1) Covered products Section 322 of the Energy Policy and Conservation Act ( 42 U.S.C. 6292 ) is amended by adding at the end the following: (c) Modifying definitions of covered products (1) In general For any covered product for which a definition is provided in section 321, the Secretary may, by rule, unless prohibited herein, modify such definition in order to— (A) address significant changes in the product or the market occurring since the definition was established; or (B) better enable improvements in the energy efficiency of the product and related energy using systems. (2) Antibacksliding exemption Section 325(o)(1) shall not apply to adjustments to covered product definitions made pursuant to this subsection. (3) Procedure for modifying definition (A) In general Notice of any adjustment to the definition of a covered product and an explanation of the reasons therefor shall be published in the Federal Register and opportunity provided for public comment. (B) Consensus required Any amendment to the definition of a covered product under this subsection must have consensus support, as reflected in— (i) the outcome of negotiations conducted in accordance with the subchapter III of chapter 5 of title 5, United States Code (commonly known as the Negotiated Rulemaking Act of 1990 )