Confused about the face mask rules for Perth and Peel? This is what you need to know MonMonday 8 updated MonMonday 8 Mask rules remain in place for people in Perth and Peel until Sunday. ( Print text only Cancel More than a week since the WA Government made mask wearing mandatory outside the home — most of the time — Premier Mark McGowan and Police Commissioner Chris Dawson are still being asked to clarify the rules. The face mask policy applies to the more than 2 million people in the Perth and Peel regions, and at this stage it is due to end on Sunday.