See 49 U.S.C. 41102 for a certificate required in nonuse of U.S. flag vessels or U.S. flag certificated air carriers.

(a) U.S.-flag ocean carriers. Arrangements for international ocean transportation services shall be made in accordance with the provisions of section 901(b) of the Merchant Marine Act of 1936, as amended (46 U.S.C. 1241(b)) concerning the use of privately owned U.S.-flag vessels.

(b) U.S.-flag certificated air carriers. Arrangements for international air transportation services shall be made in accordance with the provisions of section 5(a) of the International Air Transportation Fair Competition Practices Act of 1974 (49 U.S.C. 40118), which requires the use of U.S.-flag certificated air carriers for international travel of persons or property to the extent that services by these carriers is available.