While the constitution did not establish how many autonomous communities were to be created, on 31 July 1981, Leopoldo Calvo-Sotelo, then the prime minister of Spain and Felipe González, leader of the opposition in Parliament, signed the "First Autonomic Pacts" (Primeros pactos autonómicos in Spanish), in which they agreed to the creation of 17 autonomous communities and two autonomous cities, with the same institutions of government, but different competences.