In any action brought under paragraph (1) in which the court finds the Administrator to be in violation of any deadline in
section 2643 of this title, the court shall set forth a schedule for promulgating the regulations required by
section 2643 of this title and shall order the Administrator to comply with such schedule. The court may extend any deadline (which has not already occurred) in section 2644(b), (c), or (d) of this title for a period of not more than 6 months, if the court-ordered schedule will result in final promulgation of the pertinent regulations within the extended period. Such deadline extensions may not be granted by the court beginning 720 days after
October 22, 1986.