(1) The department of fish and wildlife shall be responsible for maintaining all records and submitting all reports required by federal or state law or regulation.

(2) A bound logbook with sequentially numbered pages shall be kept documenting the receipt and disposition of all controlled substances. In addition, all receipts and invoices shall be maintained for a period of two years.

(3) All records shall be available for inspection by the commission or any officer who is authorized to enforce this chapter.

(4) A physical inventory of approved controlled substances shall be performed, reconciled, and documented every twelve months. The inventory shall be signed and dated by the designated individual.

(5) Any discrepancy in the actual inventory of approved controlled substances shall be documented and reported immediately to the responsible supervisor who shall investigate the discrepancy. Any discrepancy that has not been corrected within seven days shall be reported in writing to the commission and the Drug Enforcement Administration (DEA).

(6) Unwanted or unused controlled substances shall be returned to the manufacturer or destroyed in accordance with the rules and requirements of the commission, the Drug Enforcement Administration, and the department of ecology.