Am I required to be a member of the BBMPOA?

Yes.
All property owners of every rateable property automatically become a member of the BBMPOA on registration of transfer into their name. All initial purchasers in Big Bay (i.e. those that purchased from the City of Cape Town) became members of the BBMPOA in terms of the conditions of sale. Every subsequent purchaser is required to sign acknowledgement that they will become members of the BBMPOA and agree to abide by the requirements of its constitution prior to the clearance certificate being issued and the transfer taking place.