; (B) shall direct the committee of scientists to provide scientific and technical advice and counsel on definitions of old growth forest ; (C) shall review the recommendations of the committee of scientists; (D) shall publish the recommendations of the committee of scientists for public comment; and (E) may adopt the recommendations of the committee of scientists and revise the definition in a manner consistent with subchapter II of chapter 5, and chapter 7, of title 5, United States Code (commonly known as the Administrative Procedure Act ). (b) Management of mature trees (1) Definition of mature forest (A) In general Consistent with section 6(m)(1) of the Forest and Rangeland Renewable Resources Planning Act of 1974 ( 16 U.S.C. 1604(m)(1) ), with respect to National Forest System land and public lands, the Secretary concerned shall define the term mature forest as a forest that has reached the merchantability standard described in subparagraph (B). (B) Merchantability standard The merchantability standard referred to in subparagraph (A) is when a forest has generally reached the culmination of mean annual increment of growth. (2) Management Except as provided in section 6(m) of the Forest and Rangeland Renewable Resources Planning Act of 1974 ( 16 U.S.C. 1604(m) ), on National Forest System land and public lands, the Secretary concerned shall only carry out regeneration harvests in mature forests (as defined by the Secretary concerned under paragraph (1)). (c) Savings clause Any inventory of forests adopted through executive branch action shall not modify, amend, or otherwise change the duties of the Secretary concerned to manage unreserved forests in accordance with, as applicable— (1) the Act of June 4, 1897 (commonly known as the Organic Administration Act ) (30 Stat. 34, chapter 2); (2) the Multiple-Use Sustained-Yield Act of 1960 ( 16 U.S.C. 528 et seq. ); (3) the Forest and Rangeland Renewable Resources Planning Act of 1974 ( 16 U.S.C. 1600 et seq. )