(a) The official written communication provided for in this article shall be certified by the municipal secretary or clerk of the governing body and shall be filed in his office, and a certified copy shall be mailed to the landowner. Where tentative approval has been granted, it shall be deemed an amendment to the zoning map, effective upon final approval, and shall be noted on the zoning map.

(b) Tentative approval of a development plan shall not qualify a plat of the planned residential development for recording nor authorize development or the issuance of any building permits. A development plan which has been given tentative approval as submitted, or which has been given tentative approval with conditions which have been accepted by the landowner (and provided that the landowner has not defaulted nor violated any of the conditions of the tentative approval), shall not be modified or revoked nor otherwise impaired by action of the municipality pending an application or applications for final approval, without the consent of the landowner, provided an application or applications for final approval is filed or, in the case of development over a period of years, provided applications are filed, within the periods of time specified in the official written communication granting tentative approval.

(c) In the event that a development plan is given tentative approval and thereafter, but prior to final approval, the landowner shall elect to abandon said development plan and shall so notify the governing body in writing, or in the event the landowner shall fail to file application or applications for final approval within the required period of time or times, as the case may be, the tentative approval shall be deemed to be revoked and all that portion of the area included in the development plan for which final approval has not been given shall be subject to those local ordinances otherwise applicable thereto as they may be amended from time to time, and the same shall be noted on the zoning map and in the records of the municipal secretary or clerk of the municipality.