Article 75

A popular referendum shall be called to decide on the complete or partial abrogation of a law or a measure having the force of law, when so requested by five hundred thousand voters or five Regional Councils. A referendum shall not be admissible in the case of laws on taxes and budgets, amnesties and pardons, or laws authorising the ratification of international treaties. All citizens eligible to vote for the Chamber of Deputies shall have the right to take part in a referendum. The proposal submitted to a referendum shall be approved if a majority of those eligible to vote has taken part in the ballot and if it receives a majority of valid votes cast. The procedures for conducting a referendum shall be established by law.