To these articles they will have to prove their title at the Custom-house.
Art. 3. Declarations made at the Custom-house for the admission of articles duty free must bear, with respect to every kind of produce, the particulars required by the Custom-house Regulations for the payment of the dues.
Art. 4. Importers must engage, by an undertaking guaranteed in due form, to prove, within a period not exceeding one year, that the raw material admitted free, or the products manufactured with such material, or, finally, the machines and machinery, detached portions of machines, and other articles completely finished and temporarily admitted free, have been applied to the use of vessels.
If, at the expiration of the term of one year, the before-mentioned proofs have not been produced, the Custom-house will collect the official fees, and take steps for their recovery, conformably to the third paragraph of Article 1 of the Law of May 19, 1866.
Art. 5. All declarations relative to machines and machinery, to detached parts of the same, and to other articles completely manufactured, should contain the description of the said articles, in order to ensure identification, and this, without prejudice to the stamp which may be applied to steam or other machinery, to detached portions of machines, to boilers, to sails, and to such other articles as the Custom-house officers may think fit to apply it.
Art. 6. The incorporation into vessels of the raw material, or the placing on board of manufactured articles destined for construction, rigging, or equipment, shall be preceded by a declaration specifying—
1st. The nature and weight of the raw material, as well as of the manufactured articles to be employed or put on board;
2nd. The date, number, and office of delivery of Custom-house discharge; and,
3rd. The vessel to the construction, repair, or use of which the said raw materials or the said manufactured articles shall have been applied.
When a manufactured article, which shall have required several metals in its construction is in question, the declaration shall indicate the weight of each kind of metal.