The zoning requirements applicable to the preliminary approval first granted and all other rights conferred upon the developer pursuant to Subsection 21-9.6c., whether conditionally or otherwise, shall not be changed for a period of two years after the date of final approval; provided that in the case of major subdivision, the rights conferred by the subsection shall expire if the plat has not been duly recorded within the time period provided in paragraph f. If the developer has followed the standards prescribed for final approval, and, in the case of a subdivision, has fully recorded the plat as required in paragraph f., the Planning Board may extend such period of protection for extensions of one year but not to exceed three extensions. Notwithstanding any other provisions of this chapter, the granting of final approval terminates the time period of preliminary approval pursuant to Subsection 21-9.6c for the section granted final approval.