; and (B) in subparagraph (F)— (i) in the matter preceding clause (i), by striking detailed statement and inserting environmental impact statement ; and (ii) in clause (iv), by striking detailed statement and inserting environmental impact statement . (e) Environmental assessment requirements Title I of the National Environmental Policy Act of 1969 ( 42 U.S.C. 4331 et seq. ) (as amended by subsection (d)(1)) is amended by adding at the end the following: 108. Environmental assessment requirements (a) Statement of purpose and need (1) In general Subject to paragraph (2), an environmental assessment shall briefly specify— (A) the underlying purpose and need to which a Federal agency is responding; and (B) the proposed agency action and the effects of the proposed agency action. (2) Statutory authority When the statutory duty of a Federal agency is to review an application for a proposed agency action, the Federal agency shall base the purpose and need to which the Federal agency is responding on the goals of the project sponsor and the authority of the Federal agency. (b) Time limit for preparing and environmental assessment (1) In general Not later than 1 year after the date on which a Federal agency decides to prepare an environmental assessment for a proposed agency action, the Federal agency shall publish in the Federal Register— (A) a notice of availability of the environmental assessment