If the Commission determines that the requirements of section 102(2)(C) of NEPA for preparation of an environmental impact statement are applicable in connection with a proposed Commission action, it shall prepare such statement generally in accordance with the procedures specified in 40 CFR parts 1500-1508, particularly part 1502 concerning impact statement preparation and content, §1505.1 concerning decision-making procedures, and §1501.6 concerning the function of cooperating agencies, to the extent that such procedures do not conflict with the Commission's statutory responsibilities and authority under the Federal securities laws.