N.C. Gen. Stat. § 115C-275
In case of vacancy by death, resignation, or otherwise, in the office of a superintendent, such vacancy shall be filled by the local board of education in which such vacancy occurred. If the vacancy is filled on a temporary basis, subject to the same approvals and to the same educational qualifications as provided for superintendents, the individual appointed to fill the vacancy on a temporary basis shall be paid the salary provided for superintendents. During the time any superintendent is on an approved leave of absence, without pay, an acting superintendent may be appointed in the same manner to serve during the interim period, which appointment shall be subject to the same approvals and to the same educational qualifications as provided for superintendents. In case such position is not filled immediately on a permanent or temporary basis, or in case of absence of a superintendent on account of illness or other approved reason, the board of education, by resolution duly adopted and recorded in the minutes of such board, may assign to an employee of such school board, with the approval of the Superintendent of Public Instruction, any duty or duties of such superintendent which necessity requires be performed during such time. If the superintendent's duty of signing warrants and checks is assigned, the board shall give proper notice immediately to the State Controller and to the appropriate local disbursing official.
N.C. Gen. Stat. § 115C-275