To further insure conformity with the provisions of this chapter in respect to new subdivisions for the purpose of a housing development, the Planning Board shall require an affidavit approved as to form by the Borough Attorney, that the subdivision will be developed as a whole so that the intent and purpose of the chapter is satisfied. The Construction Official is also hereby authorized to require a similar affidavit before issuing more than one building permit in any housing development or part thereof, in any subdivision heretofore approved by the Planning Board, prior to November 20, 1979, or on any land area not required to be subdivided.