N.C. Gen. Stat. § 162A-76
The owner or operator, including any political subdivision, of a water system supplying water to the owners, lessees or tenants of real property which is or will be served by any sewerage system owned or operated by a district is authorized to act as the billing and collecting agent of the district for any rents, rates, fees or charges imposed by the district for the services and facilities provided by such sewerage system, and such district is authorized to arrange with such owner or operator to act as the billing and collecting agent of the district for such purpose. Any such owner or operator shall, if requested by a district, furnish to the district copies of such regular periodic meter reading and water consumption records and other pertinent data as the district may require to do its own billing and collecting. The district shall pay to such owner or operator the reasonable additional expenses incurred by such owner or operator in rendering such services to the district.
N.C. Gen. Stat. § 162A-76