Polity Atlas
EstablishedSource attached · not independently reviewedCLM-0196 · as of 2026-10-23 · about: Initiative and referendum · Author: Polity Atlas editorial team

“Switzerland's optional referendum dates from 1874 (50,000 signatures within 100 days) and the federal popular initiative for partial revision from 1891 (100,000 signatures within 18 months). By end-2025, 26 of 237 initiatives voted had been accepted.”

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