The Legislative Assembly of Mexico City is formed, as it is the case for state legislatures in Mexico, by both single-seat and proportional seats, making it a system of parallel voting. Mexico City is divided into 40 electoral constituencies of similar population which elect one representative by the plurality voting system, locally called "uninominal deputies." Mexico City, as a whole, is a single constituency for the parallel election of 26 representatives, elected by proportional representation, with open-party lists, locally called "plurinominal deputies."