1179.03  APPROVAL.
   If the Planning Commission finds that the preliminary plat satisfies the requirements of these Subdivision Regulations, it shall approve the plat.  The approval of the preliminary plat is authority for the subdivider to proceed with the plans and specifications and installation of the improvements, or the arrangements to guarantee construction of such improvements required in Chapter 1181, and to proceed with preparation of the final plat in a form satisfactory for recording.