SECTION 1. Section one hundred and twenty of Act Numbered Eleven hundred and eighty-nine, entitled "An Act to provide revenue for the support of the Insular, provincial, and municipal governments by internal taxation," is hereby amended to read as follows:
"SEC. 120. Every male inhabitant of the Philippine Islands over eighteen years of age and under sixty years of age, except persons falling within the classes hereinafter mentioned, shall annually pay a poll or cedula personal tax by purchasing a certificate of registration as hereinafter provided.
Persons comprised within any of the following classes shall be exempt from the payment of this tax:
1. Members of the non-Christian tribes unless otherwise provided by law;
2. Commissioned officers of the United States army or navy;
3. Enlisted soldiers, sailors and marines of the United States army or navy;
4. Civilian employees of the military or naval branches of the United States Government who have come to the Philippine Islands
under orders of the Government of the United States.
5. Diplomatic and consular representatives and officials of foreign powers;
6. Paupers;
7. Insane persons;
8. Imbeciles;
9. Persons serving a sentence of more than one year in a public
prison;
10. Persons who are required to pay the tax imposed by section nineteen of Act Numbered Thirteen hundred and ninety-six.
Provided, That persons included in subparagraphs numbered two, three, four and five shall cease to be entitled to the exemption heiein provided for if they remain in the Philippine Islands longer than twenty days after they have ceased to belong to any of the classes contemplated, and are otherwise subject to the payment of the poll or cedula personal tax. Provided further, That it shall be the duty of provincial treasurers to issue certificates of registration to males eighteen years of age and under or sixty years of age and over, to females of any age, and to all other persons specifically exempted, who may request such certificates and pay the price imposed in the next succeeding section.'"