the town council shall in each, case prescribe, to receive such civic instruction and military training as shall fit them to exercise their civic rights, shall make them skillful in the handling of arms and familiar with military discipline.
III. To enlist and serve in the national guard, pursuant to the respective organic law for the purpose of preserving and defending the independence, territory, honour, rights and interests of the country, as well as domestic peace and order.
IV. To contribute in the proportional and equitable manner provided by law toward the public expenses of the Federation, the State and the municipality in which he resides.
Art. 32. Mexicans shall be preferred under equal circumstances to foreigners for all kinds of concessions and for all public employments, offices or commissions, when citizenship is not indispensable. No foreigner shall serve in the army nor in the police corps nor in any other department of public safety during times of peace.
Only Mexicans by birth may belong to the national navy, or fill any office or commission therein. The same requisite shall be required for captains, pilots, masters and chief engineers of Mexican merchant ships, as well as for two-thirds of the members of the crew.
