SECTION 1. Section seven of Republic Act Numbered Six hundred and three is hereby amended, to read as follows:
"SEC. 7. The Mayor.—The mayor shall be the chief executive of the city. He shall be elected at large by the qualified voters of the city on the date of the elections for provincial and municipal officials in conformity with the provisions of the Revised Election Code. No person shall be eligible for the position of mayor unless at the time of the election he is at least twenty-five years of age, a resident of the city for at least one year prior to his election and is a qualified voter of the city. He shall assume office on the first day of January following his election, and upon qualifying, shall hold office for four years and until his successor shall have been duly elected and qualified, unless sooner removed or suspended for cause, as provided by law.
"He shall receive a salary of eight thousand four hundred pesos per annum, and in addition to his salary, a non-commutable allowance of not exceeding two thousand four hundred pesos per annum."