Quick search by citation:

22 U.S. Code § 2516 - Use of foreign currencies

Whenever possible, expenditures incurred in carrying out functions under this chapter shall be paid for in such currency of the country or area where the expense is incurred as may be available to the United States.

Editorial Notes
References in Text

This chapter, referred to in text, was in the original “this Act”, meaning Pub. L. 87–293, Sept. 22, 1961, 75 Stat. 612, known as the Peace Corps Act. For complete classification of this Act to the Code, see Short Title note set out under section 2501 of this title and Tables.