To resolve interagency disagreements concerning a proposed major Federal action that might cause unsatisfactory environmental effects, Federal agencies may refer to CEQ for resolution of issues. Under CEQ regulations (40 CFR Part 1504), an agency may refer a proposed action to CEQ no later than 25 days after the final EIS has been made available to the public, commenting agencies, and the Environmental Protection Agency (EPA). The Administrator of the EPA has broader authority, under section 309 of the Clean Air Act, to refer to CEQ any proposed legislation, action, or regulation that the Administrator deems unsatisfactory from the standpoint of public health or welfare or environmental quality.