Had a question from a coach during our preseason meeting, and I had to give him the, "I'm not sure, but I'll get back to you" answer. I can't find anything that specifically prohibits this in the rulebook, so my inclination is to say it's OK, but I'm asking here for the good of the order. There are posts in the past on similar subjects that don't address this specific situation, so I hope there's some good conversation to be had.
Coach wants to use a player as a restricted lineman sometimes, and as a tight end sometimes. When he is lining up as a restricted interior lineman he'll wear #79, and when he lines up at TE he will wear #80. Is there any restriction on this?
As a follow up/sub-topic, does the player/coach have to inform the referee/officials that the change is taking place (or back again)?