41 C.F.R. § 301-10.180 Must I travel by a U.S. flag ship?
Title 41 - Public Contracts and Property Management
Yes, when a U.S. flag ship is available unless the necessity of the mission requires the use of a foreign ship. (See 46 U.S.C. App. Sec. 1241.)
Title 41: Public Contracts and Property Management
PART 301–10—TRANSPORTATION EXPENSES
Subpart B—Common Carrier Transportation
Ship
§ 301-10.180 Must I travel by a U.S. flag ship?