; or (ii) there are significant new circumstances or information relevant to environmental concerns and bearing on the proposed action or its impacts. (B) Mitigation plans If a draft environmental impact statement prepared with respect to an application for Federal authorization does not include information about mitigation plans for adverse impacts that cannot reasonably be avoided, a supplemental environmental impact statement shall be prepared that includes such information. (3) Public meeting requirements In complying with the National Environmental Policy Act of 1969 ( 42 U.S.C. 4321 et seq.) with respect to an application for Federal authorization, the Commission shall ensure that any public meeting shall be held— (A) in each county or equivalent subdivision in which the project will be located; and (B) during each period of public comment following, 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: (4) 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