who shall furthermore prove to the said Department that they have resided within the country during the six years immediately prior to the said declaration.
II. Mexicans by naturalization are:
(a) The children of foreign parentage born in the country, who shall elect Mexican citizenship in the manner prescribed in the foregoing clause, and in whom the residence qualification required in the said section does not concur.
(b) Those persons who shall have resided in the country for five consecutive years, have an honest means of livelihood and shall have obtained naturalization from the said Department of Foreign Affairs.
(c) Those of mixed Indian and Latin descent who may have established residence in the Republic, and shall have manifested their intention to acquire Mexican citizenship.
In the cases stipulated in these sections, the law shall determine the manner of proving the requisites therein demanded.
Art. 31. It shall be the duty of every Mexican:
I. To compel the attendance at either private or public schools of their children or wards, when under fifteen years of age, in order that they may receive primary instruction and military training for such periods as the law of public instruction in each State shall determine.
II. To attend on such days and at such hours as
