39 U.S.C. § 5602
Contracts for the transportation of mail by vessel between the United States and a foreign port shall be made subject to cancellation by the Postal Service or the Congress.
(Pub. L. 91–375, , 84 Stat. 773.)
Section effective , pursuant to Resolution No. 71–9 of the Board of Governors. See section 15(a) of Pub. L. 91–375, set out as a note preceding section 101 of this title.