(1) This Part (other than Subpart 131.Z) applies in relation to Part 131 aircraft.
(2) A Part 131 aircraft is any of the following:
(a) a manned free balloon;
(b) a hot air airship.
(3) Subpart 131.Z applies in relation to a tethered gas balloon that:
(a) is equipped to carry one or more persons; and
(b) is permanently tethered.