(2) The department shall adopt rules necessary for the efficient and economical operation, use, maintenance, repair and replacement of and access to all motor vehicles, and shall require the keeping of such records of use, access, costs and operations and the making of such reports as will enable the exercise of proper controls.
(3) By rule, the department shall prohibit the operation of a state-owned motor vehicle by any person under 18 years of age.
(4) The department shall adopt rules that require uniform schedules for preventive maintenance of state-owned motor vehicles. [Formerly 291.716; 1993 c.335 §8; 1997 c.848 §6]