5 U.S.C. § 5561: Definitions

“agency” means an Executive agency and a military department; inside the continental United States; or who is a resident at or in the vicinity of his place of employment in a territory or possession of the United States or in a foreign country and who was not living there solely as a result of his employment; a wife; an unmarried child (including an unmarried dependent stepchild or adopted child) under 21 years of age; a dependent mother or father; a dependent designated in official rec­ords; and an individual determined to be dependent by the head of the agency concerned or his designee; “active service” means active Federal service by an employee; missing; missing in action; interned in a foreign country; captured, beleaguered, or besieged by a hostile force; or detained in a foreign country against his will; basic pay; special pay; incentive pay; basic allowance for housing; basic allowance for subsistence; and station per diem allowances for not more than 90 days.