Article 53 Political Constitution of the United Mexican States

The territorial demarcation of the 300 single-member electoral districts shall be that resulting from dividing the total population of the country among the indicated districts. The distribution of the single-member electoral districts among the states (federal entities) shall be made taking into account the last general population census, without in any case the representation of a state (federal entity) being able to be less than two majority deputies.

For the election of the 200 deputies according to the principle of proportional representation and the System of Regional Lists, five plurinominal electoral circumscriptions shall be constituted in the country, formed in accordance with the principle of parity, and headed alternately between women and men each electoral period. The Law shall determine the form of establishing the territorial demarcation of these circumscriptions.