(a) If, following the conference or review of submitted materials described in §669.15, the Administrator concludes that the state is in compliance, the Administrator shall issue a decision which is the final decision, and the matter shall be concluded.

(b) If, following the conference or review of information submitted under §669.15, the Administrator, with the concurrence of the Secretary, concludes that the state is in noncompliance, the Administrator shall issue a decision, which is the final decision, and the matter be concluded. The decision will be served on the Governor, or his/her designee.