45 C.F.R. § 1321.25 – Duration, format, and effective date of the State plan.

(a) A State agency will follow the guidance issued by the Assistant Secretary for Aging regarding duration and formatting of the State plan. Unless otherwise indicated, a State agency may determine the format, how to collect information for the plan, and whether the plan will remain in effect for two, three, or four years.
(b) An approved State plan or amendment identified in § 1321.31(a) becomes effective on the date designated by the Assistant Secretary for Aging.
(c) A State agency may not make expenditures under a new plan or amendment requiring approval, as identified in § 1321.27 or § 1321.31(a), until it is approved.