No certificate of occupancy shall be issued until all improvements shown on the approved site plan are installed or a security in an amount representing 150% of the estimated cost of the improvements to be completed is posted in accordance with New York State Village Law § 7-725-a, Subdivision 7. The form of the security shall be that which is provided in New York State Village Law § 7-730, Subdivision 9, and shall be accompanied by a written irrevocable authorization for access to the subject site for installation of improvements by the Village or its authorized representative.