This part contains regulations pertaining to the entry and withdrawal of merchandise under the provisions of section 557, Tariff Act of 1930, as amended (19 U.S.C. § 1557), which among other things provides that articles subject to duty may be entered for warehousing and deposited in a bonded warehouse at the expense and risk of the owner, importer, or consignee, and withdrawn from warehouse for consumption upon payment of duties and charges. The requirements and procedures set forth in this part are in addition to the general requirements and procedures for all entries set forth in part 141 of this chapter. Regulations pertaining to manipulation in warehouse, manufacturing warehouses, and smelting and refining warehouses are set forth in part 19 of this chapter.