Section 1
SECTION 1. Section twenty-one hundred and seventy of the Revised Administrative Code, as amended, is further amended to read as follows: "SEC. 2170. Classification of municipalities-Number of councilors.-Municipalities are divided into seven classes, according to their income, as follows: "(a) First Class-A: The municipalities that have obtained an average total revenue of two hundred thousand Pesos or more per annum during the last four fiscal years, and shall have eight councilors; "(b) First Class-B: The municipalities that have obtained an average total revenue of one hundred thousand pesos or more per annum, but less than two hundred thou- pesos, during the last four fiscal years, and shall have councilors; "(c) First Class: The municipalities that have obtained an average total revenue of fifty thousand pesos or more per annum, but less than one hundred thousand pesos during the last four fiscal years, and shall have eight councilors; "(d) Second Class: The municipalities that have obtained an average total revenue of thirty thousand pesos or more per annum, but less than fifty thousand pesos during the last four fiscal years, and shall have eight councilors; "(e) Third Class: The municipalities that have obtained an average total revenue of fifteen thousand pesos or more per annum, but less than thirty thousand pesos, during the last four fiscal years, and shall have six councilors; "(f) Fourth Class: The municipalities that have obtained an average total revenue of five thousand pesos or more per annum, but less than fifteen thousand pesos, during the last four fiscal years, and shall have six councilors; "(g) Fifth Class: The municipalities that have obtained an average total revenue of less than five thousand pesos per annum during the last four fiscal years, and shall have four councilors; "Provided, That the councilors elected at the last general election in each municipality shall continue to hold office during the term for which they were elected, and the reduction or increase of the number of councilors in accordance with the classification of municipalities prescribed in this Act shall take effect beginning with the general election of nineteen hundred and fifty-one."