Protective breathing equipment (PBE) containing a small chemical oxygen generator for use by aircrew members may be transported on passenger aircraft in accordance with Packing Instruction 565 subject to the following conditions:

----------------------------------------------------------
a) the PBE must be serviceable and contained in the manufacturer's
 original unopened inner packaging (i.e. vacuum sealed bag and
 protective container);

b) the PBE may only be consigned by, or on behalf of, an operator in the
 event that a PBE(s) has been rendered unserviceable or has been used
 and there is a need to replace such items so as to restore the number of PBEs on an aircraft to that required by pertinent airworthiness
 requirements and operating regulations;

c) a maximum of two PBE may be contained in a package;

d) the statement "Aircrew protective breathing equipment (smoke hood) in
 accordance with Special Provision A144" must be:

  (i) included on the dangerous goods transport document;

 (ii) marked adjacent to the proper shipping name on the package.

If the above conditions are met, the requirements of Special Provision A1 do not apply. All other requirements applicable to chemical oxygen generators must apply except that the "cargo aircraft only" handling label must not be displayed.