Gamesir g7 pro banned from call of duty bo7 tournaments?

My son is going to a call of duty black ops 7 lan type tournament in Jacksonville Florida in early September and is under the impression that he can't use the controller that he has it's AG7 pro game sir not the 8K model. Just the regular g7 pro.

After doing some research I found that there was a tournament mode to the gamesir 7 pro controller, would this make it legal to use?

He wants the new marius board controllers from demon workshop and battle beaver but 350 after shipping for a controller that only works on pc and switch seems short sighted. Anyone know where I can find a rulebook for cdl tourneys.