Variation from original plan. In the event that the development plan submitted contains variations from the development plan granted tentative approval, the governing body may refuse to grant final approval and may, within 45 days of the official filing date of the application for final approval (provided, however, that should the next regular meeting occur more than 30 days following the official filing date, the forty-five-day period shall be measured from the 30th day following the day the application has been filed), advise the applicant, in writing, of said refusal, setting forth in said notice the reasons why one or more of the variations are not in the public interest. In the event of such refusal, the landowner may either refile the application for final approval without the variations objected; or file a written request with the local governing body that it hold a public hearing on the application for final approval. If the landowner wishes to take either alternate action, he may do so at any time within which he shall be entitled to apply for final approval, or within 30 additional days, if the time for applying for final approval shall have already passed at the time when the landowner was advised that the development plan was not in substantial compliance. If the landowner fails to take either of these alternate actions within said time, he shall be deemed to have abandoned the development plan. Any such public hearing shall be held pursuant to public notice within 30 days after request for the hearing is made by the landowner, and the hearing shall be conducted in the manner described in this article for public hearings on applications for tentative approval. Within 30 days after the conclusion of the hearing, the governing body shall by official written communication either grant final approval to the development plan or deny final approval. The grant or denial of final approval of the development plan shall, in cases arising under this section, be in the form and contain the findings required for an application for tentative approval set forth in this article. Failure of the governing body to render a decision on an application for final approval and communicate it to the applicant within the time and in the manner required by this section shall be deemed an approval of the application for final approval, as presented, unless the applicant has agreed in writing to an extension of time or change in the prescribed manner of presentation of communication of the decision, in which case, failure to meet the extended time or change in manner or presentation of communication shall have like effect.