C.F.R. » Title 14 » CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION › SUBCHAPTER C—AIRCRAFT › PART 31—AIRWORTHINESS STANDARDS: MANNED FREE BALLOONS › Subpart D—Design Construction

14 C.F.R. § 31.51

Ballast

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Each captive gas balloon must have a means for the safe storage and controlled release of ballast. The ballast must consist of material that, if released during flight, is not hazardous to persons on the ground.