Where to find info?
Surely you can get the information regarding operational requirements and limitations on the use of the system from the relevant governing body (CAD). If you are unsure of how the system operates the first requirement is to find out. How much time on oxy do you have? Is it 100% flow or is it able to be diluted? Above what altitude MUST you use oxygen? These seem to be basic questions you need to have answers for before flying to high altitudes.