45 C.F.R. § 506.1 “Civilian American citizen” defined.
Title 45 - Public Welfare
Civilian American citizen means any person who, being then a citizen of the United States, was captured in Southeast Asia during the Vietnam conflict by any force hostile to the United States, or who went into hiding in Southeast Asia in order to avoid capture or internment by any such hostile force.
Title 45: Public Welfare
PART 506—ELIGIBILITY REQUIREMENTS FOR COMPENSATION
Subpart A—Civilian American Citizens
§ 506.1 “Civilian American citizen” defined.