[Code of Federal Regulations] [Title 41, Volume 4] [Revised as of July 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 41CFR301-10.140] [Page 32] TITLE 41--PUBLIC CONTRACTS AND PROPERTY MANAGEMENT CHAPTER 301--TEMPORARY DUTY (TDY) TRAVEL ALLOWANCES PART 301-10_TRANSPORTATION EXPENSES--Table of Contents Subpart B_Common Carrier Transportation Sec. 301-10.140 May I use a foreign air carrier if the service is preferred by or more convenient for my agency or me? No. You must use U.S. flag air carrier service, unless you meet one of the exceptions in Sec. 301-10.135, Sec. 301-10.136, or Sec. 301- 10.137 or unless foreign air carrier service is deemed a matter of necessity under Sec. 301-10.138.