28 U.S.C. § 3906
Payments
A judgment, award, or compromise settlement against the United States under this chapter (including any interest and costs) shall be paid—
(1)
under section 1304 of title 31 , if it arises out of an action commenced in a district court of the United States (or any appeal therefrom); or
(2)
out of amounts otherwise appropriated or available to the office involved, if it arises out of an appeal from an administrative proceeding under chapter 5 of title 3.
(Added Pub. L. 104–331, § 3(c) , Oct. 26, 1996 , 110 Stat. 4071 .)