The provisions of this chapter shall be administered by the Planning Board of Kingwood Township in accordance with N.J.S.A. 40:55D-1 et seq., its amendments and supplements thereto, or the Kingwood Township Board of Adjustment where so authorized to act; provided that in the case of a decision by the Board of Adjustment, the time permitted shall be 120 days from the date of submission of a complete application rather than the time specified for the Planning Board so to act by this chapter.