It is further provided that where a lead-in line, a shutoff box, and service cock have previously been installed the applicant shall only be required to install at his own expense the lead-in line to the residence or building to be served; that in the event that it is necessary to replace an existing line, the lead-in line from the city water main to the shutoff box should be made by the city while the lead-in line from the shutoff box to the residence or structure being served should be made by the property owners at the property owner's cost; that in the event that a sewer line need be replaced, said line should be replaced at the property owner's expense from city interceptor sewer to the residence or structure being served. (1972 Code)