14 C.F.R. § 101.19 Rapid deflation device.
Title 14 - Aeronautics and Space
No person may operate a moored balloon unless it has a device that will automatically and rapidly deflate the balloon if it escapes from its moorings. If the device does not function properly, the operator shall immediately notify the nearest ATC facility of the location and time of the escape and the estimated flight path of the balloon.
Title 14: Aeronautics and Space
PART 101—MOORED BALLOONS, KITES, UNMANNED ROCKETS AND UNMANNED FREE BALLOONS
Subpart B—Moored Balloons and Kites
§ 101.19 Rapid deflation device.