Reemployment of Civilian Retirees to Meet Exceptional Employment Needs regulations can be located in 5 CFR part 553. This authority is considered a Dual Compensation Waiver and information regarding the definition and sample request template can be found at the informational link located in references.
OPM provides a list of Q&As regarding reemployed annuitants. If management is interested in utilizing this as a possibly recruitment option, please contact your servicing HR Specialist for guidance.