This standard is intended to apply to that portable compressed gaseous oxygen equipment used for the administration of supplementary and/or first aid oxygen to one or more occupants of either private or commercial transport aircraft. This standard is applicable to the following types of portable oxygen equipment:

1. a Continuous flow;
2. b Demand flow;
   1. 1 Straight demand
   2. 2 Diluter demand
   3. 3 Pressure demand
3. c Combination continuous flow and demand flow.