N.C. Gen. Stat. § 86B-69

Every certificate issued pursuant to G.S. 86B-67 or G.S. 86B-68 shall be renewed annually. On or before the date the current certificate expires, the applicant must submit an application for renewal of certification on a form approved by the Board, meet criteria for renewal established by the Board, and pay the required fee. Failure to renew the certificate within 90 days after the expiration date shall result in automatic forfeiture of any certification issued pursuant to this Chapter.