Temporary instructor permits may be issued after special examination by the Department of Motor Vehicles and upon payment of a twenty-dollar fee to the department. Temporary instructor permits are valid for six months and until the next available and approved qualifying class, but in no event shall such permits exceed one year. A temporary driver instructor’s activities and instruction are subject to an audit of driving skills and classroom teaching by authorized representatives of the department. The proceeds from the sale of temporary instructor permits must be deposited in the state general fund.