(a) On the return of a case to an agency pursuant to the final determination of the Division, the head of the agency shall implement the final determination not later than 30 days after the effective date of the notice of the final determination.

(b) A final determination will be effective as of the date of filing of an application, the date of the transaction or event in question, or the date of the original adverse decision, whichever is applicable under the applicable agency program statutes or regulations.