N.C. Gen. Stat. § 115C-459
Loans made under the provisions of this Article shall be payable in 10 installments, shall bear interest at a uniform rate determined by the State Board of Education not to exceed eight percent (8%), payable annually, and shall be evidenced by the note of the county, executed by the chairman, the clerk of the board of county commissioners, and the chairman and secretary of the local board of education, and deposited with the State Treasurer. The first installment of such loan, together with the interest on the whole amount then due, shall be paid by the local board on the tenth day of February after the tenth day of August subsequent to the making of such loan, and the remaining installments, together with the interest, shall be paid on the tenth day of February of each subsequent year until all shall have been paid.
N.C. Gen. Stat. § 115C-459