Section 2
SEC. 2. Before commencing business the proprietor of any manufacturing bonded warehouse which is then a going concern shall file with the Insular Collector of Customs a list of all goods, wares, and merchandise on hand in such factory upon which import duties have been paid, which goods, wares, and merchandise are to be used in the manufacture of articles for exportation, whereupon the Refund of amount of such duties shall be ascertained and refunded to the proprietor of such warehouse, and in all cases before commencing business the proprietor of any manufacturing bonded warehouse shall tile with the Insular Collector of Customs a list of all the articles intended to be manufactured in such warehouse and state the formula of manufacture and the names and quantities of each of the various ingredients to be used therein. This formula may be changed from time to time by giving written notice to the Insular Collector of Customs.