; (ii) the obligations of a cooperating agency or participating agency under the National Environmental Policy Act of 1969 ( 42 U.S.C. 4321 et seq. ) have already been satisfied with respect to the project; or (iii) the Secretary determines that reliance on a single environmental document (as described in subparagraph (A)) would not facilitate timely completion of the environmental review process for the project. (3) Participating agency responsibilities An agency participating in the expedited and coordinated environmental review process under this section shall— (A) provide comments, responses, studies, or methodologies on areas within the special expertise or jurisdiction of the agency; and (B) use the process to address any environmental issues of concern to the agency. (o) Environmental impact statement (1) In general In preparing a final environmental impact statement under the National Environmental Policy Act of 1969 ( 42 U.S.C. 4321 et seq. ) for a project described or designated under subsection (b), if the Secretary modifies the statement in response to comments that are minor and are confined to factual corrections or explanations of why the comments do not warrant additional agency response, the Secretary may write on errata sheets attached to the statement instead of rewriting the draft statement, subject to the condition that the errata sheets— (A) cite the sources, authorities, and reasons that support the position of the agency; and (B) if appropriate, indicate the circumstances that would trigger agency reappraisal or further response. (2) Single document To the maximum extent practicable, for a project subject to a coordinated review process under this section, the Secretary shall expeditiously develop a single document that consists of a final environmental impact statement and a record of decision, unless— (A) the final environmental impact statement or record of decision makes substantial changes to the project that are relevant to environmental or safety concerns