(1) No owner or operator of a non-pressurised aircraft shall operate the aircraft at altitudes between 10 000 ft and 12 000 ft for longer than 120 minutes intended flight time, or above 12 000 ft, unless such aircraft is equipped with the supplemental oxygen as prescribed in Document SA-CATS 91 and such oxygen may be used continuously whenever these circumstances prevail.
(2) The conditions, rules, requirements, procedures or standards for supplemental oxygen shall be as prescribed in Document SA-CATS 91.