[82-3.] SECTION  2116 . Classification of Municipalities — Number of Councilors. —  Municipalities are divided into four classes, according to the number of inhabitants. Municipalities of the first class shall be those which contain not less than twenty-five thousand i nhabitants, and shall have eighteen councilors; of the second class, those containing eighteen thousand and less than twenty-five thousand inhabitants, and shall have fourteen councilors; of the third class, those containing ten thousand and less than ei ghteen thousand inhabitants, and shall have ten councilors; of the fourth class, those containing less than ten thousand inhabitants, and shall have eight councilors. [82-4 ( a ); 1691-1; 1903-1.] SECTION  2117 . Change of Population as Affecting Classification of Municipalities. —  As the population of a municipality shall sufficiently increase or diminish, as shown by the census, it shall pass to the appropriate higher or lower class, upon the passin g of a resolution to that effect by the provincial board. [82-4 ( d ); 1691-1.] S ECTION  2118 . Additional Councilors for Municipality Passing to Higher Class. —  In case the class of a municipality shall be raised the additional councilors appropriate to its new class shall be obtained by electing, at the regular election next following  the change, one-half of the total number of councilors prescribed for municipalities of that class and at each succeeding election an equal number. During the interim between the change and the seating of the councilors first elected thereafter the council  shall consist of the former number of councilors. After the seating of said first elected councilors and until the seating of those next elected it shall consist of a number midway between the former number and the number prescribed for the new class. [1433-1; 1691-1.] S ECTION  2119 . Reduction in Number of Councilors for Municipality Passing to Lower Class . — In case a municipality is reduced in class all of the councilors in office shall be allowed to serve out their full terms, except that in case of death, resignation,  or removal of any such councilor the vacancy thereby caused shall not be filled unless such vacancy reduces the number of councilors below that prescribed for the new class, in which case the vacancy shall be filled as hereinafter in this title provided.  At the election next following the change of class the number of councilors elected shall be equal to one-half of the number prescribed for the new class, and at each succeeding election an equal number shall 620 Philippine Law Encyclopedia 2011 Copyright 2012 CD Technologies Asia, Inc. and Accesslaw, Inc.