Company is shifting liability to crews, nothing more. When the lawsuits start to arrive UPS will say, ‘we mandated it in many cases, strongly encouraged it in all others and provided masks around the entire system. The pilot’s chose (intentionally against the policy) not to wear them. Not our fault.’ They’ll could also try to use it as a way to weasel out of Covid-LOA pay as well : “we told you to wear a mask, found out during contract tracing interviews that people said you weren’t wearing yours. Sorry.” Might not be in our best interest to play cowboy with this, just IMHO.