DATT0

I know I need a mod plate for the rear seats but I read on the internet that you need the roll cage to be bolted down to do with the "jaws of life" if you were in a roll over, but since there is no longer rear seats I was wondering if it still mattered with the roll cage

Got a roll cage in a 1200 Coupe which has been welded in. Got told off a mate that only bolt in cages can be mod plated. The rear seats have been removed and the plates aren't small. Would it be possible to get a mod plate?