N.C. Gen. Stat. § 58-5-20
Type of deposits.
§ 58-5-20. Type of deposits.
The deposits required to be made under G.S. 58-5-5, 58-5-10, and 58-5-50 shall be composed of:
(a) Interest-bearing bonds of the United States of America;
(b) Interest-bearing bonds of the State of North Carolina, or of its cities or counties; or
(c) Certificates of deposit issued by any solvent bank domesticated in the State of North Carolina.