31.1—Applicability.
(a)
This part prescribes airworthiness standards for the issue of type certificates and changes to those certificates, for manned free balloons.
(b)
Each person who applies under Part 21 for such a certificate or change must show compliance with the applicable requirements of this part.
(5)
The trapeze is a harness or is a seat consisting of a horizontal bar or platform suspended beneath the envelope for the balloon occupants; and
(6)
The design maximum weight is the maximum total weight of the balloon, less the lifting gas or air.