N.C. Gen. Stat. § 159-18: Capital reserve funds.

Any local government or public authority may establish and maintain a capital reserve fund for any purposes for which it may issue bonds. A capital reserve fund shall be established by resolution or ordinance of the governing board which shall state (i) the purposes for which the fund is created, (ii) the approximate periods of time during which the moneys are to be accumulated for each purpose, (iii) the approximate amounts to be accumulated for each purpose, and (iv) the sources from which moneys for each purpose will be derived. (1943, c. 593, ss. 3, 5; 1957, c. 863, s. 1; 1967, c. 1189; 1971, c. 780, s. 1.)