High Altitude Descents

Each person making a parachute descent from above 13,000 feet shall:

• 1) Have satisfactorily completed an approved training course for high altitude descents.
• 2) If using an unpressurised aircraft between 13,000 feet and 20,000 feet, use supplementary oxygen until immediately prior to exiting the aircraft.
• 3) If using a pressurised aircraft between 13,000 feet and 20,000 feet, use supplementary oxygen during the period from immediately prior to depressurisation to immediately prior to exiting the aircraft.
• 4) If making a descent above 20,000 feet, use individual supplementary oxygen from immediately prior to depressurisation, or from immediately after disconnection from any aircraft mounted supplementary oxygen system, until descent below an altitude of 13,000 feet.