Aircrew equipment limits

Question 1

What must aircrew do before ejection seat safety pin is removed?

Answer 1

1. Be strapped in
2. Wear an oxygen mask
3. Have helmet visor down

Question 2

When is the exception to these rules allowed?

Answer 2

To relieve an immediate aeromedical occurrence (airsickness, valsalva, eye irritation) but only for the tie it takes to remedy the condition