Institutional Revolutionary Party
Cárdenas's successor Manuel Ávila Camacho gave the party its present name in 1946. The party, under its three different names, held every political position until 1946 when the PAN started winning posts for municipal president and federal deputies and senators, starting in 1946, after the party changed its name to its current name, the Institutional Revolutionary Party. By then, the party had acquired a reputation for corruption, and while this was admitted (to a degree) by some of its affiliates, its supporters maintained that the role of the party was crucial in the modernization and stabilization of Mexico.
L Legislature of the Mexican Congress
Legal reform, known formally as the "Ley de Organizaciones Políticas y Procedimientos Electorales (LOPPE)" (Law of Political Organizations and Electoral Procedures), defined and made possible procedures for the registration of new political parties (in 1977 legally there were only the PRI, the National Action Party) (PAN), the Popular Socialist Party (PPS) and the Authentic Party of the Mexican Revolution (PARM)). This allowed for the registration, for the first time in 40 years of the Mexican Communist Party, which was followed by the National Assembly of the Socialist Left, the Mexican Democratic Party and the Social Democratic Party.