N.C. Gen. Stat. § 160D-951

Whenever any regulation adopted pursuant to this Part requires a longer waiting period or imposes other higher standards with respect to a designated historic landmark or district than are established under any other statute, charter provision, or regulation, this Part shall govern. Whenever the provisions of any other statute, charter provision, ordinance, or regulation require a longer waiting period or impose other higher standards than are established under this Part, such other statute, charter provision, ordinance, or regulation shall govern.