The Planning Board shall not give final approval to the site plan until the plan for the sanitary sewage disposal system or hookup to a central sewer system has been approved by the Ramsey Board of Health, the plan of landscaping has been approved by the Shade Tree Commission, fire and safety requirements have been approved by the Fire Prevention Bureau, the water supply system has been approved by the Board of Public Works, and a cash deposit or surety company performance bond in such amount as shall be fixed by the Planning Board has been posted to guarantee the installation of shade trees and shrubbery and the installation of all improvements provided for in such site plan. Pending approval by the latter boards, bureau and commission, however, the Planning Board may give preliminary approval to the site plan to indicate that all other municipal requirements have been complied with. Thereafter, final approval shall be granted when the above-mentioned cash deposit or surety company performance bond is posted and upon satisfactory proof that approval has been granted by the Health and Water Boards, the Fire Prevention Bureau and the Shade Tree Commission, provided, however, that no substantial changes shall have been required and/or made to the site plan as preliminary approved.