N.C. Gen. Stat. § 159-134

An issuing unit may employ a bank or trust company either within or without this State as fiscal agent for the payment of installments of principal and interest on the bonds, and for the destruction of paid or cancelled bonds and coupons, and may pay reasonable fees for this service not in excess of maximum rates to be fixed by regulation of the Commission. If an issuing unit employs another person as such fiscal agent or any other person for other services pursuant to the Registered Public Obligations Act of North Carolina, then it may pay reasonable fees for such services not in excess of maximum rates to be fixed by regulation of the Commission.