N.C. Gen. Stat. § 115C-91: Continuance and discontinuance of contracts with publishers.

When an existing or future contract expires, the Board may, with the publisher's approval, continue the contract for any particular book or books for a period not less than one or more than five years. If a publisher desires to terminate a contract that has been extended beyond the original contract period, he shall give notice to the Board 90 days prior to May 1. The Board may then proceed to a new adoption. (1955, c. 1372, art. 24, s. 7; 1969, c. 519, s. 1; 1981, c. 423, s. 1.)