; and (B) during each period of public comment preceding, if applicable, publication of— (i) a draft environmental impact statement; (ii) a final environmental impact statement; and (iii) any supplemental environmental impact statement. . 4. Impacts on critical natural resources Subsection (g) of section 15 of the Natural Gas Act ( 15 U.S.C. 717n ) (as added by section 3) is amended by adding at the end the following: (5) National scenic trails (A) In general In preparing an environmental impact statement with respect to an application for Federal authorization for a project, any evaluation of the visual impacts of the project on a national scenic trail designated by the National Trails System Act ( 16 U.S.C. 1241 et seq.) in the environmental impact statement shall— (i) consider the cumulative visual impacts of any similar proposed project— (I) for which an application for Federal authorization is in the pre-filing or filing stage; and (II) that impacts the same national scenic trail within 100 miles of the first project; and (ii) include visual impact simulations depicting leaf-on and leaf-off views at each location where major visual impacts occur, as identified, authenticated, and justified during the period of public comment preceding the publication of a draft environmental impact statement by the head of the Federal agency or independent agency administering the land at the applicable location. (B) National forest management plans No amendment to a National Forest management plan under the Forest and Rangeland Renewable Resources Planning Act of 1974 ( 16 U.S.C. 1600 et seq.) shall be considered if the result of the amendment represents net degradation to the resources of a national scenic trail designated by the National Trails System Act ( 16 U.S.C. 1241 et seq.). .