SECTION 1. Section seven of Republic Act Numbered Five hundred twenty-three, otherwise known as the Charter of the City of Butuan, is amended to read as follows:
"SEC. 7. The Mayor—His election, qualifications and compensation.—The Mayor shall be the chief executive of the city. He shall be elected by the qualified voters of the city during every election for provincial and municipal officials in conformity with the provisions of the Revised Election Code. No person shall be elected mayor unless he is at least twenty-five years of age, a resident of the city for at least two years prior to his election, and a qualified voter therein.
"He shall receive compensation as provided in Republic Act Numbered Eight hundred forty, entitled 'An Act classifying chartered cities, except Manila, Baguio and Quezon Cities, according to their annual revenues and fixing the salaries of the officials thereof."