A house connection built by WSSC prior to a property owner’s application for service is referred to as an “ahead-of-payment” connection. Although the connection is available, no HC charges are assessed until an application for service is made. The rate(s) charged for the house connection would be that in effect at the time of application, rather than those in effect at the time of construction. (Property assessments manual § 12.3, dated October 1998)