Legal provisions for mandatory referendums at national level

Constitution (7^th revision, 2005)

Article 255 (Creation by law)

The administrative regions shall be created simultaneously by means of a law, which shall define their powers and the composition, competences and modus operandi of their organs and may establish differences between the regime applicable to each administrative region.

Article 256 (De facto institution)

1. The de facto institution of the administrative regions by means of the passage of the individual laws instituting each one shall depend on the law provided for in the previous Article, and on an affirmative vote by the majority of the registered electors who cast their votes in a direct national ballot covering each of the regional areas.

The establishment of administrative regions is subject to a mandatory referendum.