(a) The citizen plaintiff in a citizen enforcement suit filed against an alleged violator under section 505(a)(1) of the Act shall serve a copy of a proposed consent judgment, signed by all parties to the lawsuit, upon the Administrator, Environmental Protection Agency, Washington, DC 20460, and the Attorney General, Department of Justice, Citizen Suit Coordinator, Room 2615, Washington, DC 20530. The plaintiff shall serve the Administrator and the Attorney General by personal service or by certified mail (return receipt requested.) The plaintiff shall also mail a copy of a proposed consent judgment at the same time to the Regional Administrator of the EPA Region in which the violations were alleged to have occurred.

(b) When the parties in an action in which the United States is not a party file or lodge a proposed consent judgment with the court, the plaintiff shall notify the court of the statutory requirement that the consent judgment shall not be entered prior to 45 days following receipt by both the Administrator and the Attorney General of a copy of the consent judgment.

(1) If the plaintiff knows the dates upon which the Administrator and the Attorney General received copies of the proposed consent judgment, the plaintiff shall so notify the court.

(2) If the plaintiff does not know the date upon which the Administrator and Attorney General received copies of the proposed consent judgment, the plaintiff shall so notify the court, but upon receiving such information regarding the dates of service of the proposed consent judgment upon the Administrator and Attorney General, the plaintiff shall so notify the court of the dates of service.