The director of accounts and reports shall design, devise and direct the use of inventory records by all state agencies to show all fixed and movable property of the state. The records shall be based on a physical inventory and shall be charged with all subsequent purchases, manufacture of property or other methods of acquisition and shall be reduced by all property traded in, condemned or otherwise disposed of. The accuracy of such property record shall be verified periodically by actual inspection of such property by the state agency and shall be verified periodically by the division of accounts and reports. The state agencies may be required to take physical inventory of such properties annually and at such other times as the director of accounts and reports may direct.