Procedure on acceptance of public improvements. When the developer has constructed and installed the streets, drainage facilities, curbs, sidewalks, street signs, monuments and other improvements in accordance with Township regulations, standards and specifications and desires the Township to accept the said improvements, he shall, in writing, addressed to and in a form approved by the Township Committee, with copies thereof to the Township Engineer, request the Township Engineer to make a semifinal inspection of the said improvements. If the improvements have been constructed under a performance guaranty after approval of a final plat, the developer shall submit an as-built plan showing as-built grades, profiles and sections and locations of all subsurface utilities, such as french drains, combination drains, sanitary sewage disposal systems, both public and individual waterlines and control valves, gas lines, telephone conduits, monuments, iron property markers and any other utilities or improvements installed other than as shown on the approved final plat. Said as-built plan shall be certified to by a licensed New Jersey professional engineer. If any improvements are constructed prior to final plat approval, the final plat shall reflect all changes and as-built conditions and be so certified. Said as-built plan(s) shall be submitted on reproducible media.