Depends on the country. In Slovenia you have to collect 40k supporter signatures or have ~1/3 of the parliament support it. And a referendum can only cancel already passed laws, it cannot pass a new law.
The one they had in UK was a non-binding one, which can usually only be brought to a vote by the parliament.
The one they had in UK was a non-binding one, which can usually only be brought to a vote by the parliament.