(1) When requested by 500,000 voters or by five regional councils, a popular referendum decides on total or partial repeal of a law or other acts with legal force.
(2) No such referenda are allowed for tax or budget laws, amnesties, pardons, or ratification of international treaties.
(3) Citizens entitled to vote for the house of representatives may also participate in a referendum.
(4) The referendum succeeds if a majority of those eligible have participated and if the proposal has received a majority of the valid votes.
