You can always request someone to change their gloves. Though I have done this only twice. Once when someone was slicing meat, and once when I was getting a flu shot and the person had used the gloves to pick stuff off the floor.
The law sounds like a good thing to me.
Yes, of course, you can always request that someone change their gloves. And you can request that they wash their hands after handling money, the telephone, etc.
You can make those requests and sometimes that request goes very well.
But sometimes, a snotty kid gets really huffy about being asked to adjust his or her sanitation procedure.
Like the last time I asked a kid at Subway to please put on gloves. I had been watching him and his hands that were constantly tucking his long hair back behind his ears, and scratching himself in various locations, and talking on the phone, and taking money from the three folks in front of me. And doing absolutely nothing regarding hand sanitizing in-between waiting on these customers and scratching and telling whomever it was on the phone what time the store closed, which was in about ten minutes. I was the last in line.
Finally it was my turn.
Me, as nicely as possible, so as not to rile him, "I thought y'all usually wore gloves here."
"Well, then, would you mind washing your hands before fixing my sandwich? I saw you making change, and you know what they say about money (nervous laugh) heheheh...."
Whereupon he glared at me for a few minutes, then turned his back to me and walked over to the sink, made a BIG show of scrubbing and washing his hands all the way up to his elbows brain-surgeon style, then pulled a couple of paper towels from the dispenser and, turning slightly in order to completely shield his face (but I could see his face in the reflection of the shiny paper towel dispenser), blew his nose into the paper towels and proceeded to dry his hands with them.
All I'm saying is that "you-can-always-ask" thing works great some of the time.
And a lot of the time, it does not.