compilation of the returns of the commerce, navigation, and immigration of the Islands for the preceding year. [355-3 (12).] Collection Districts and Ports of Entry SECTION  1324 . Collection Districts and Ports of Entry Thereof.  — For administrative purposes the Philippine Islands shall be divided into six collection districts, the respective limits of which may be changed from time to time in the discretion of the Ins ular Collector. The principal ports of entry for the respective collection districts shall be Manila, Tabaco, Iloilo, Cebu, Zamboanga, and Jolo. [355-10.] SECTION  1325 . Collector of Customs at Port of Entry . — At each principal port of entry there shall be a collector of customs who, under the supervision and control of the Insular Collector, shall be the official head of the customs service in his port and  district and shall there exercise the functions of captain of the port. [355-12.] At Manila the Insular Collector and the Insular Deputy Collector shall respectively discharge the duties of collector of customs and deputy collector of customs for the said port. [355-11.] SECTION  1326 . Seal of Collector of Customs . — In the office of the collector of customs of a collection district shall be kept a seal of such design as the Insular Collector shall prescribe, with which shall be sealed all documents and records requiring au thentication in such office. [355-22.] SECTION  1327 . Port Regulations . — A collector of customs may prescribe local administrative regulations, not inconsistent with law or the general Bureau regulations, for the government of his port or district, the same to be effective upon approval by the  Insular Collector. [355-371; Comp., 1743.] Copyright 2012 CD Technologies Asia, Inc. and Accesslaw, Inc. Philippine Law Encyclopedia 2011 392 ARTICLE  II