The status quo ante:

“Here’s your uniform shirt, new guy. Would you like a hat or a visor to go with it?”

Recently:

“FYI, visors are no good any more, unless you wear a hairnet under it. Ask us for a hat.”

Then:

“We actually don’t have any hats at the moment. Never mind for now.”

They probably don’t have any hairnets, either.

This is what happens when they want to amend the uniform rules but aren’t in the habit of telling us anything, and they also don’t want to spend any money…