Hi ally,
Thks for "Procedure".
The mask-relevant content appears to be para.10. I doubt that this "Procedure" can be practically implemented as stated unless additional context proves otherwise,, eg, offhand, some initial queries "sprang to mind" -
(a) are all the workers pre-separated by 2-metre spaced plastic "screens" ? (I noticed such an action in some US meat-packing lines)
(b) "close proximity" means less than 2 metres ?
(c) replacement / disposition ?
Items such as (b,c) could be interpreted/ handled in a (connected) Work Instruction (WI)(also see below) but IMO a "Procedure" anyway needs to be less ambiguous.
@ MrsPowell - I think the problem in answering Posts (1,3) in a "concise" form is illustrated by above.
A brief mask Policy is IMO not so difficult. (eg Due Covid, there is now a need to protect one's fellow workers and thereby also oneself. Accordingly Masks are to be hygienically used as an addition to "social distancing" as per CDC [FDA etc?] recommendations). Similarly with respect to a Generic Procedure based on CDC, etc logics.
But a WI is IMO also necessary. This will likely depend (eg donning, removing, cleaning, disposing) on the specific type of mask/situation involved. Some examples/references/quotations are variously posted here. They occupy some length.