Policy Act of 1969 ( 42 U.S.C. 4321 et seq.). (3) Supplemental environmental impact statements (A) In general If the Commission determines that comments submitted in response to a draft environmental impact statement prepared with respect to an application for Federal authorization raise issues that exceed the initial scope of the draft environmental impact statement, a supplemental environmental impact statement shall be prepared for the project. (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 that information. (4) 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