Greg- I'll take it one step more, I don't have to accept them even if they are Listed. As it turns out they aren't required to be listed. per NEC. The "plates" I had questioned have no combustible material exposed to the electrical components of the switch or receptacle. Actually they were rather well crafted. Must of cost a fair amount of money to have the finish carpenter spend all that time with the router etc.
I make the statement in my classes that nothing in our trade is required to be UL Listed just to get their attention and it usually works. But it's true.