N.C. Gen. Stat. § 53C-6-17
A bank may close a branch upon providing written notice to the Commissioner and the customers of the branch at least 90 days prior to the proposed closing. The notice shall include the date the branch will close and posting, in a conspicuous manner on the branch premises for a period of 30 days prior to the proposed closing date, a notice of its intent to close the branch. The consolidation of two or more branches into a single location in the same vicinity shall not be considered a closure subject to the 90-day and 30-day notice requirements of this section. To be considered a consolidation, the bank shall request consolidation treatment from the Commissioner, who shall decide, in his or her discretion, whether the branches to be consolidated are considered to be in the same vicinity, with due consideration to the distance between the branches and the nature of the market in which the branches are situated.
N.C. Gen. Stat. § 53C-6-17