Categorical exclusion— A road closure that the Secretary concerned determines to be necessary under subparagraph (A) or (B) of paragraph (1) or the establishment of a new road nominated for establishment under subparagraph (A) of paragraph (3) shall be categorically excluded from the requirements of the National Environmental Policy Act of 1969 (
42 U.S.C. 4321 et seq.), subject to any regulations requiring a determination that there are no extraordinary circumstances that warrant the preparation of an environmental assessment or an environmental impact statement with respect to the proposed road closure or establishment of the new road.