(1) The developer may convert all or any portion of any convertible area into condominium units or common elements, including, without limitation, limited common elements, subject to the restrictions which the condominium documents may specify.

    (2) The developer shall promptly prepare, execute, and record an amendment to the master deed describing the conversion. The amendment shall assign an identifying number to each condominium unit formed out of convertible area and shall allocate to each condominium unit a portion of the undivided interest in the common elements appertaining to that area. The amendment shall describe or delineate any limited common elements formed out of the convertible area, showing or designating the condominium unit or condominium units to which each is assigned.