Can anyone confirm if the developer needs to pay the maintenance and sinking fund for those unbuild phase?

Sorry i didnt make my question clear. A developer already built 2 phases of landed strata parcel and VP as well. The 3rd phase is yet to be built. Thus the common area which is shared by the 3 phases. Maintenance and sinking fund are for the common area which is already built. So does the developer need to pay the maintenance charges for the phase not built? Doesnt make sense if only Ph 1 & 2 covering the maintenance cost for the common area is is suppose to be shared by the 3 phases. What does the law say?