14 C.F.R. § 101.31 Applicability.
Title 14 - Aeronautics and Space
This subpart applies to the operation of unmanned free balloons. However, a person operating an unmanned free balloon within a restricted area must comply only with §101.33 (d) and (e) and with any additional limitations that are imposed by the using or controlling agency, as appropriate.
Title 14: Aeronautics and Space
PART 101—MOORED BALLOONS, KITES, UNMANNED ROCKETS AND UNMANNED FREE BALLOONS
Subpart D—Unmanned Free Balloons
§ 101.31 Applicability.