Everywhere I’ve been honours it. They are required by law. Canadian tire and Costco say that they don’t have to let you in if you don’t wear a mask, and they have the documentation to prove it (they don’t). Remind them that according to the human rights code of Ontario you cannot be refused service based on disability (not being able to wear a mask is a disability). I have had both Costco and Canadian tire managers go do my shopping for me while I wait outside. I get my stuff faster than I would be able to find it and I don’t have to wait in the checkout line. If everyone did this, they would give up and just let you in, but not enough people do. And make sure you are polite the whole time, these managers are just doing what they are told to do, is illegal but they don’t want to lose their jobs.

Edit: I’ve been contemplating just walking in anyway without them letting me, because by law they cannot touch you, and they have to call the police, the police will either not do anything or charge you with something that will not hold up in court if it ever sees the time of day, but I don’t do this because I don’t want to stress out my wife. If you’re single and brave, let me know how it goes.