A. Except as provided in §B of this regulation, carbon copies of invoices may not be accepted.
B. Carbon copies may be accepted when used in:
(1) Meter imprinters to print the number of gallons metered; or
(2) Multi-part forms if:
(a) The original (top part) is used as a shipping/delivery ticket,
(b) The form has been approved by the Comptroller, and
(c) The part used as an invoice has preprinted on it the notation "Original Invoice" or other language approved by the Comptroller.