Section 227
SEC. 227. Warehouses duly authorized for the storage of imported dutiable goods shall be known and designated as of classes one, two, three, or four. Warehouses which are owned or leased by the Government and used for the storage of seized or unclaimed goods shall be known as of class one. Where no such warehouses are available for said purpose, such goods may be stored in a warehouse of class three. If there be no warehouse of the latter class the collector may, with the approval of the Insular Collector, procure suitable premises for the temporary storage of imported goods of which he has under law taken possession. Importers private bonded warehouses, occupied exclusively for the storage of imported merchandise used by the proprietors and entered in bond, shall be known as class two. Warehouses of this class shall be used only for such purpose. Cellars and vaults may, in the discretion of the Insular Collector, be bonded in this class for the storage of wines and spirits only. Bonded warehouses used for the general storage of imported goods shall be known as of class three. Warehouses of this class shall consist of entire buildings used solery for the storage of bonded goods and of unclaimed or seized goods therein by the collector. Bonded yards or sheds for the storage of heavy and bulky imported merchandise shall be known as warehouses of class four. Warehouses of this class shall be used exclusively for the storage of wood, coal, dyewoods, lumber, marble; railroad, pig, and bar iron; anchors, chain cables, and other heavy bulky articles. The yards must be closed by substantial fences not less than twelve feet in height, with entrance gates opening into the street or public way, and provided with suitable doors or other fastenings so as to admit of being secured by customs locks. Sheds, when required, must be constructed within the limits of the yanl, and in such manner as to protect from injury the goods stored therein, and the doors and other openings must be provided with suitable fastenings. The collector may order to such yards unclaimed or seized goods or seized goods therein of the character described in this class. Whenever the business of a port of entry requires the facilities of bonded yards, barns, or sheds for the protection of imported horses, cattle, sheep, and so forth, application shall be made by the collector to the Insular Collector for authority to provide the same.