Since self-determination is not recognized in the Spanish Constitution of 1978, some Basques abstained and some voted against it in the referendum of December 6 of that year. It was approved by a clear majority at the Spanish level, and with 74.6% of the votes in the Basque Country. However, the overall turnout in the Basque Country was 45% when the Spanish overall turnover was 67.9%. The derived autonomous regime for the BAC was approved by Spanish Parliament and also by the Basque citizens in referendum. The autonomous statue of Navarre ("Amejoramiento del Fuero": "improvement of the charter") was approved by the Spanish Parliament and, like the statues of 13 out of 17 Spanish autonomous communities, it did not need a referendum to enter into force.