In addition to the leave of absence provided in §8-33-109, all officers and employees of this state, or any department or agency thereof, or of any county, municipality, school district, or other political subdivision, all other public employees of this state and all private sector employees who are members of the Tennessee army and air national guard on active state duty or the Tennessee state guard and civil air patrol shall be entitled to an unpaid leave of absence from their respective duties, without loss of time, pay not specifically related to leave of absence time, regular leave or vacation or impairment of efficiency rating for all periods of service during which under competent orders they are engaged in the performance of duty or training in the service of this state, including the performance of duties in an emergency.