Upon the completion of each section of the development as set forth in the approved general development plan, the developer shall notify the Administrative Officer, by certified mail, as evidence that the developer is fulfilling his obligations under the approved plan. For the purpose of this section, "completion" of any section of the development shall mean that the developer has acquired a certificate of occupancy for every residential unit or every nonresidential structure, as set forth in the approved general development plan and pursuant to N.J.S.A. 52:27D-133. If the municipality does not receive such notification at the completion of any section of the development, the municipality shall notify the developer, by certified mail, in order to determine whether or not the terms of the approved plan are being complied with.