(1) shall be maintained on an inventory by the school; and
(2) if purchased by the Department under the act will be maintained on a Statewide inventory.
(b) It is presumed that textbooks on loan to nonpublic schools after a period of time will be lost, missing, obsolete, or worn out. This information should be communicated to the Department. After a period of six years, textbooks will be declared unserviceable and the disposal of such will be at the discretion of the Secretary.