In the following circumstances, the copy of Customs Form 7512 to be retained at the port of first arrival may be adapted for use as a combined inward foreign manifest and in-bond transportation or direct exportation entry:
(a)
When all the merchandise arriving on one vehicle (except on trucks on the Canadian border) is to move in bond in the importing vehicle in a continuing movement through the United States; or
(b)
When all the merchandise arriving on one vessel or on one vehicle (except on trucks on the Canadian border) is entered immediately upon arrival either under a single immediate transportation entry or a single transportation and exportation or direct exportation entry.
When Customs Form 7512 is to be used in this manner, the foreign port of lading and the name of the shipper shall be shown in every case, and a certificate in the following form shall be legibly stamped on the manifest or on a separate paper securely fastened thereto and executed by the master of the vessel or the person in charge of the vehicle: