(1) No owner or operator of a pressurised aircraft shall operate the aircraft unless such aircraft is equipped with the supplemental oxygen as prescribed in Document SA-CATS 91 and such oxygen may be used continuously whenever the circumstances for which its supply has been prescribed prevail.
(2) No owner or operator of a pressurised aircraft shall operate the aircraft above 25 000 ft unless all flight crew members have available at their flight duty station a quick-donning type of oxygen mask which will readily supply oxygen upon demand.