; or (B) are subject to Federal control and responsibility. (c) Request for public comment Each notice of intent to prepare an environmental impact statement under section 102 shall include a request for public comment on alternatives or impacts and on relevant information, studies, or analyses with respect to the proposed agency action. (d) Statement of purpose and need Each environmental impact statement shall include a statement of purpose and need that briefly summarizes the underlying purpose and need for the proposed agency action. (e) Estimated total cost The cover sheet for each environmental impact statement shall include a statement of the estimated total cost of preparing such environmental impact statement, including the costs of agency full-time equivalent personnel hours, contractor costs, and other direct costs. (f) Page limits (1) Environmental impact statements (A) In general Except as provided in subparagraph (B), an environmental impact statement shall not exceed 150 pages, not including any citations or appendices. (B) Extraordinary complexity An environmental impact statement for a proposed agency action of extraordinary complexity shall not exceed 300 pages, not including any citations or appendices. (2) Environmental assessments An environmental assessment shall not exceed 75 pages, not including any citations or appendices. (g) Sponsor preparation A lead agency shall allow a project sponsor to prepare an environmental assessment or an environmental impact statement upon request of the project sponsor. Such agency may provide such sponsor with appropriate guidance and assist in the preparation. The lead agency shall independently evaluate the environmental document and shall take responsibility for the contents upon adoption. (h) Deadlines (1) In general Except as provided in paragraph (2), with respect to a proposed agency action, a lead agency shall complete, as applicable— (A) the environmental impact statement not later than the date that is 2 years after the sooner of, as applicable—