N.C. Gen. Stat. § 106-352

If it shall be determined by the State Veterinarian or an authorized quarantine inspector, that any county or counties shall be partially or completely infested with the cattle tick (Margaropus annulatus), the county commissioners of said counties which are partially or completely infested with the cattle tick (Margaropus annulatus) shall immediately take up the work of systematic tick eradication as hereafter provided and continue same until the cattle tick (Margaropus annulatus) is completely eradicated and notice in writing of same is given by the State Veterinarian.