The municipal council of each municipality shall fix the limits of all the precincts, if there are more than one, within its territory; and this whether the territory of the various barrios of the municipality is contained wholly within one Assembly distri ct or is assigned to more than one such district. [1582-8; 2045-6.] S ECTION  507 . Arrangement of Precincts . — The precincts shall be so arranged that no precinct shall have more than four hundred voters, and each shall comprise, as far as practicable, contiguous and compact territory. When it appears from the results of any registration or election that a precinct contains more than four hundred voters, the municipal council shall, at least four months prior to the next election, make such adjustment or new division as may be necessary. HICcSA When an old municipality which has previously had only one precinct has been merged into another, so as thereby to become a barrio, this barrio shall also constitute at least one voting precinct, if the distance between the remotest barrio of the merged mu nicipality and the nearest polling place of the municipality to which it is annexed shall, by the shortest road, exceed five miles. [1582-8; 2045-6.] S ECTION  508 . Posting Map or Plan of Precincts . — Maps or plans plainly showing the boundaries of the precinct shall be posted and kept posted at the polling place or places and at two other conspicuous public places in each precinct for at least forty-five  days before each election, and the plans of all the precincts of the municipality shall be kept posted at the municipal building for the same number of days before each election. [1582-8; 2045-6.] When the municipal council rearranges the precincts, or creates a new one, notice of such change shall be filed with the provincial treasurer together with a map or plan of the several precincts as changed. cDTACE [2045-6.] S ECTION  509 . Posting Map or Plan of Assembly District . — In those provinces which are subdivided into Assembly districts the respective provincial boards shall cause to be prepared an outline map or plan of each district, showing the location and names of  the municipalities, or portions thereof, included in the district. These shall be filed with the Executive Secretary, and a copy of each shall 157 Copyright 2012 CD Technologies Asia, Inc. and Accesslaw, Inc. Philippine Law Encyclopedia 2011