14 C.F.R. § 375.30 Operations other than commercial air operations.
Title 14 - Aeronautics and Space
Foreign civil aircraft that are not engaged in commercial air operations into, out of, or within the United States may be operated in the United States and may carry non-revenue traffic to, from or between points in the United States.
Title 14: Aeronautics and Space
PART 375—NAVIGATION OF FOREIGN CIVIL AIRCRAFT WITHIN THE UNITED STATES
Subpart D—Authorized Operations
§ 375.30 Operations other than commercial air operations.