(a) Application for installation of water mains in regularly platted real estate development subdivisions shall be filed with the Water Utility.
(b) If the developer, or a contractor employed by the developer, is to install the water mains (with approval of the Water Utility), the developer shall be responsible for the total cost of construction.
(c) If the Water Utility or its contractor is to install the water mains, the developer shall be required to advance to the Water Utility, prior to the beginning of the construction, the total estimated cost of the extension. If the final costs exceed estimated costs, an additional billing will be made for the balance of the cost due. This balance is to be paid within thirty (30) days. If final costs are less than estimated, a refund of the overpayment will be made by the Water Utility.