Offiicial ruling on button binding/mapping?

I’m curious what the stance is/will be on button binding/mapping for tournaments. Didn’t see anything mentioned in the EVO rules but want to be sure. Generally I’m against it but the stick I’ll be using won’t have a back button to Taunt. Am I allowed to map Taunt to another button? If I see others map LMP to one button should I call them out? lol

Sorry to create a whole thread for this but figured it was worth squaring before EVO.