N.C. Gen. Stat. § 136-271

All Authority funds shall be deposited in a bank or banks to be designated by the Authority. Funds of the Authority shall be paid out only upon warrants signed by the treasurer or assistant treasurer of the Authority and countersigned by the chairman, the acting chairman or the executive director. No warrants shall be drawn or issued disbursing any of the funds of the Authority except for a purpose authorized by this Article and only when the account or expenditure for which the same is to be given in payment has been audited and approved by the Authority or its executive director.