I suggest that the basic criteria you need to adhered to has nothing to do with by-laws etc. You need to go to your local council, who would have issued the Development Approval on your strata complex, and ask them to confirm whether or not the use to which you are putting your unit to is compliant with their DA on the property. It’s is as simple as that.
Don’t entertain ‘negotiating’ with your fellow Lot Owners a way around/through/over this issue. Don’t put everyone through all this stress and expose everyone to possibly endless frustration and angst!
Council has the final word on whether or not what you are doing is compliant with the ‘intended use’ of the premises.