The exportation of any shipment of distilled spirits or wine may be evidenced by:
A copy of the export bill of lading (§ 28.250); or
A copy of the railway express receipt (§ 28.251); or
A copy of the air express receipt (§ 28.252); or
A copy of the through bill of lading where exportation is to a contiguous foreign country (§ 28.250); or
A certificate by the export carrier, as provided for in § 28.253.