Australian Standards in regard to respirators are clear about being clean shaven.
However companies have come up with masks that are safe with beards. These include positive flow full face. Sounds very similar to a quick don on pressure flow.
I feel for the folks at QF that are caught up in this affair
AS/NZS1715:2009 APPENDIX B FACIAL SEAL OF RESPIRATORS has the below information regarding facial hair and wearing a respirator.
Beard growth, some hairstyles and other facial features prevent an adequate seal between the wearer’s face and the fitting surfaces of a facepiece or mouthpiece. Facial hair may also interfere with inhalation and exhalation valve operation. The complete sealing surface of the respirator mask should be in contact with the wearer’s skin.