N.C. Gen. Stat. § 130A-331

All persons and units of local government locating, constructing, altering, or operating, or intending to locate, construct, alter, or operate, a public water system, as defined in G.S. 130A-313, are prohibited from requiring the installation of a redundant inline water service shutoff or cutoff valve between a water service meter and a customer receiving water service within a dwelling subject to the North Carolina Residential Code. This section does not apply to (i) integrated valves attached or located within a water meter box for the purpose of water meter installation, repair, or replacement or (ii) valves installed as an accessible main shutoff valve near the entrance of water service as required by the North Carolina Residential Code.