Unless the developer elects to submit a separate application pursuant to the last paragraph of subsection 13-3.1i,5(d) (N.J.S.A. 40:55D-70(d)) the planning board shall hear and act upon any requests for granting of variances, conditional use approval and/or direction for issuance of a building permit at the same time that they hear and act upon a minor subdivision, preliminary plat of a major subdivision, or a preliminary plat of a major site plan. Such simultaneous action may be taken in conjunction with a final plat of a major subdivision or site plan if revisions in the plat subsequent to preliminary plat approval shall have created the need for such simultaneous action or if the application is for combined preliminary and final plat approval.