Insular Collector.  — When any new or unsettled question shall be determined by a collector of customs, he shall, if the matter is not otherwise carried up for review in ordinary course, notify  the Insular Collector of his decision and submit an adequate statement of facts involved. [355-23.] SECTION  1557 . Application of Established Ruling or Decision . — A customs ruling or decision which determines the construction or application of any provision of law imposing customs duties shall not be administratively reversed or modified unless at least  sixty days public notice shall be given in the form of a published tariff decision. [Cooley's Blackstone, p. 577.] SECTION  1558 . Reduction of Proof to Writing . — When proof is taken in any proceeding or matter under the authority of the Bureau of Customs, either party may require that the same be reduced to writing; and when so taken it shall be filed in the office of  the collector of customs and preserved for use or reference until final decision. [355-293.] SECTION  1559 . Collector of Customs Not Liable in Respect of Rulings in Customs Cases . — No collector or other officer of customs shall be in any way personally liable for or on account of any official ruling or decision as to which the person claiming to b e aggrieved has the right to obtain either an administrative or judicial review under the provisions of this chapter; and except for a misdelivery of merchandise, a collector of customs shall not, in the absence of his own abuse of authority, be liable to  any person for a loss occasioned either by his own official act or the act of his subordinates. [355-25; 1520-2; Comp., 1399; Act of Cong., Aug. 5 (1909).] SECTION  1560 . Obstruction of Customs Premises . — No person shall obstruct a customhouse, warehouse, office, wharf, street, or other premises under the control of the Bureau of Customs or any of the approaches to such houses or premises. [355-26; 1149-1.] SECTION  1561 . Interests Prohibited to be Held by Customs Employees . — No persons employed under the authority of the Government of the Philippine Islands in the collection of duties or imports, exports, or tonnage dues shall own, Copyright 2012 CD Technologies Asia, Inc. and Accesslaw, Inc. Philippine Law Encyclopedia 2011 455