The Planning Board shall have the right to waive any of the requirements of this section if the strict enforcement thereof will cause undue hardship to the applicant or if the benefits of the granting of the waiver will outweigh any detriments caused by the waiver. Notwithstanding the foregoing, the Planning Board shall not have jurisdiction to grant a density greater than that permitted by Subsection 23-11.7. Such jurisdiction shall lie only with the Board of Adjustment in accordance with applicable provisions of the Municipal Land Use Law.