The Department of Administration shall direct the use of inventory records by all state agencies to show all fixed and movable property of the state. The records must be based on a physical inventory and charged with all subsequent purchases and shall be reduced by all property traded in, condemned, or disposed of. The accuracy of the property record shall be verified periodically by actual inspection of the property by the department. The state agencies may be required to take physical inventory of properties annually and at other times as the department directs.