APPLICATION FOR APPROVAL OF DE-NATURING BONDED WAREHOUSE. "SEC. 7. Whenever a distiller wishes to commence the business of de-naturing alcohol he must make written application to the collector of the district in which the distillery is located for the approval of a de-naturing bonded warehouse. Such application must give the name or names of the person, firm, or corporation operating the distillery, the number of the distillery, the location of the same, the material of which the warehouse is constructed, the size of same, width, length and height, the size of the de-naturing material room therein, and the manner of its construction, the capacity in gallons of each tank to be used for de-naturing alcohol or for holding the de-naturing agents, and the material of which said tanks are constructed. Such application must be accompanied by a diagram correctly representing the warehouse, the mixing tanks, de-naturing material room, and de-naturing material tanks, with all openings and surroundings. It must show the distillery and all the distillery bonded warehouses on the premises, with dimensions of each." Sections 9 and 10 of the regulations deal with the examination and approval of the de-naturing warehouse and plant by the Internal Revenue officers. DE-NATURING WAREHOUSE BOND TO BE GIVEN. "SEC. 11. After receipt of notice of the approval of said warehouse the distiller may withdraw from his distillery warehouse, free of tax, alcohol of not less than 180 degrees proof or strength, and may de-nature same in said de-naturing warehouse in the manner hereinafter indicated, provided he shall first execute a bond in the form prescribed by the Commissioner of Internal Revenue, with at least two sureties, Unless, under the authority contained in an act approved August 13, 1894, a corporation, duly authorized by the Attorney-General of the United States to become a surety on such bond, shall be offered as a sole surety thereon. The bond shall be for a penal sum of not less than double the tax on the alcohol it is estimated the distiller will de-nature during a period of 30 days, and in no case is the distiller to withdraw from bond for de-naturing purposes and have in his de-naturing warehouse in process of de-naturation a quantity of alcohol the tax upon which is in excess of the penal sum of the bond. SEC. 12. If at any time, it should develop that the de-naturing warehouse bond is insufficient the distiller must give additional bond.