(a) Captives are entitled to receive or have credited to their account, for the period in captive status, the same pay and allowances to which they were entitled at the beginning of that period or to which they may have become entitled thereafter.

(b) A person designated as a captive (or a family member of a principal) under subpart A of this subchapter whose captivity commenced on or after November 4, 1979, is also entitled to receive a cash payment from the captive's employing agency, for each day held captive, in an amount equal to but not less than one-half of the amount of the world-wide average per diem rate established under 5 U.S.C. 5702.