N.C. Gen. Stat. § 150B-21.14
The Commission may call a public hearing on a rule when it extends the period for review of the rule. At the request of an agency, the Commission may call a public hearing on a rule that is not before it for review. Calling a public hearing on a rule not already before the Commission for review places the rule before the Commission for review. When the Commission decides to call a public hearing on a rule, it must publish notice of the public hearing in the North Carolina Register.
After a public hearing on a rule, the Commission must approve the rule or object to the rule in accordance with the standards and procedures in this Part. The Commission must make its decision of whether to approve or object to the rule within 70 days after the public hearing.
N.C. Gen. Stat. § 150B-21.14