Hearings involving the question of the nonrenewal of a probationary certificated employee’s contract or the nonrenewal of a superintendent shall not be due process hearings and shall not be required to meet the requirements of section 79-832 but shall be informal hearings at which the probationary certificated employee or superintendent, or his or her representative, shall be afforded the opportunity to discuss and explain his or her position with regard to continued employment, to present information, and to ask questions of those appearing on behalf of the school district. Such hearings shall be held in closed session at the request of the certificated employee or superintendent, or his or her representative, and upon affirmative vote of a majority of the school board members present and voting, but the formal action of the school board for nonrenewal shall be in open session.