N.C. Gen. Stat. § 160A-315: Billing and collecting agents for certain sewer systems.

Any city that maintains and operates a sewage collection and disposal system but does not maintain and operate a water distribution system is authorized to contract with the owner or operator of the water distribution system operating within the area served by the city sewer system to act as the billing and collection agent of the city for any charges, rents, or penalties imposed by the city for sewer services. (1933, c. 322, s. 1; 1941, c. 106; 1961, c. 1074; 1971, c. 698, s. 1.)