Clickers: Limiting resident parking

I live in a big building, 300+ apartments, and the owner of each car space is issued with a clicker for that car park to let them in/out of the building. This limits ‘rouge parkers’ and quite successfully, but it also means you can’t have a spare clicker i.e. leave one in your work car or, in my case, give one to my mum who uses my second car space from time to time and one to my dad who also uses that same car space from time to time. Is my body corporate allowed to limit the number of clickers?