N.C. Gen. Stat. § 150B-21.13

When the Commission extends the period for review of a permanent rule, it must notify the agency that adopted the rule of the extension and the reason for the extension. After the Commission extends the period for review of a rule, it may call a public hearing on the rule. Within 70 days after extending the period for review of a rule, the Commission must decide whether to approve the rule, object to the rule, or call a public hearing on the rule.