N.C. Gen. Stat. § 15-196.4

Upon sentencing or activating a sentence, the judge presiding shall determine the credits to which the defendant is entitled and shall cause the clerk to transmit to the custodian of the defendant a statement of allowable credits. Upon committing a defendant upon the conclusion of an appeal, or a parole, probation, or post-release supervision revocation, the committing authority shall determine any credits allowable on account of these proceedings and shall cause to be transmitted, as in all other cases, a statement of the allowable credit to the custodian of the defendant. Upon reviewing a petition seeking credit not previously allowed, the court shall determine the credits due and forward an order setting forth the allowable credit to the custodian of the petitioner.