Exchanges.—

Sec. 509. Exchanges.—Defense articles or defense services transferred to the United States Government by a country or international organization as payment for assistance furnished under this part may be used to carry out this part, or may be disposed of or transferred to any agency of the United States Government for stockpiling or other purposes. If such disposal or transfer is made subject to reimbursement, the funds so received shall be credited to the appropriation, fund, or account funding the cost of the assistance furnished or to any appropriation, fund, or account currently available for the same general purpose.