When so authorized, as evidenced by the appropriate TTB officer's statement on the schedule, the manufacturer shall dispose of the cigarette papers and tubes as specified in the schedule. After the articles are disposed of, the manufacturer shall execute a certificate on both copies of the schedule received from the appropriate TTB officer, to show the disposition and the date of disposition of the articles. In connection with a claim for credit or refund, the manufacturer shall attach the original of the schedule to the claim for credit or refund, TTB F 5620.8, filed under § 40.473. When an appropriate TTB officer is assigned to verify the schedule and supervise disposition of the cigarette papers and tubes, such officer shall, upon completion of the assignment, execute a certificate on all copies of the schedule to show the disposition and the date of disposition of the articles. In connection with a claim for allowance, the officer shall return one copy of the schedule to the manufacturer for the record, and in connection with a claim for credit or refund, the officer shall return the original and one copy of the schedule to the manufacturer, the original of which the manufacturer shall attach to the claim filed under § 40.473.