22 U.S. Code § 4012a - Foreign national employees separation pay
There is established in the Treasury of the United States a fund to provide separation pay for foreign national employees of agencies of the United States Government, other than the Department of Defense.
There shall be deposited in such account—
(1) all amounts previously obligated for accrued separation pay of foreign national employees of such agencies of the United States Government; and
Amounts shall be deposited in the fund annually and are authorized to be available until expended.