[JRutledge]

You might want a local ruling to decide what is appropriate. Based on the way I understand the rule this is not illegal to wear a sleeve. Your state might take a different approach to this and really you need to take this from them. A medical wavier might need to be from the state, not just something simply from a doctor. They cannot were casts on their arms and shoulders even if they have a waiver, so that means nothing unless your state or region recognizes such waiver.

Peace