N.C. Gen. Stat. § 115C-278
Local boards of education shall have authority to employ an assistant superintendent, in addition to those that may be furnished by the State when, in the discretion of the board of education, the schools of the administrative unit can thereby be more efficiently and more economically operated and when funds for the same are provided in the current expense fund budget. The duties of such assistant superintendent shall be assigned by the superintendent with the approval of the board of education.
Local boards of education may, upon the recommendation of the superintendent, elect assistant or associate superintendents for a term of from one to four years. The term may not, however, exceed the expiration date of the superintendent's contract, unless the remaining time of the superintendent's contract is less than one year. If there is less than one year remaining on the superintendent's contract, the assistant or associate superintendent shall be given a contract through the next school year.
The term of employment shall be stated in a written contract which shall be entered into between the board of education and the assistant or associate superintendent, a copy of which shall be filed with the Superintendent of Public Instruction as a matter of information. The assistant or associate superintendent may not be dismissed during the term to which he is elected except for misconduct of such a nature as to indicate he is unfit to continue in his position, incompetence, neglect of duty, or failure or refusal to carry out validly assigned duties.
N.C. Gen. Stat. § 115C-278