CFR > Title 14 - Aeronautics and Space > CHAPTER II—OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) > SUBCHAPTER D—SPECIAL REGULATIONS (parts 372 to 383) > PART 380—PUBLIC CHARTERS > SUBPART B—Conditions and Limitations (§380.10 to §380.17) > 380.13—Prohibition on sale of round trips with open returns.