employee
(2) “employee” means an employee in or under an agency who is a citizen or national of the United States or an alien admitted to the United States for permanent residence, but does not include a part-time or intermittent employee or native labor casually hired on an hourly or daily basis. However, such an employee who enters a status listed in paragraph (5)(A)–(E) of this section— (A) inside the continental United States; or (B) 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; is an employee for the purpose of this subchapter only on a determination by the head of the agency concerned that this status is the proximate result of employment by the agency;