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5.1.1 Mandatory referendum
DENMARK- Extracts of the Constitution (1953)
ESTONIA - Extracts of the Constitution (1992)
GERMANY - Extracts of the Constitution (1976)
GERMANY - Extracts of the Constitution (1969)
IRELAND - Extracts of the Constitution (1937)
ITALY - Extracts of the Constitution (1947)
LATVIA - Constitution (2019)
LATVIA - Extracts of the Constitution (2004)
LIECHTENSTEIN- Extracts of the Constitution (1921)
LITHUANIA - Extracts of the Constitution (1992)
SPAIN - Extracts of the Constitution (1978)
SWITZERLAND - Constitution (2020)
SWITZERLAND - Extracts of the Constitution (2005)
SWITZERLAND - Federal Constitution of the Swiss Confederation (2021)
SWITZERLAND - Federal Constitution of the Swiss Confederation (1999)
SWITZERLAND - Federal Constitution of the Swiss Confederation (2015)
UKRAINE - Constitution (1996)
ARMENIA - Law on Referendum (2001)
AZERBAIJAN - Election Code (2003)
AZERBAIJAN - Election Code (2019)
HUNGARY - Act CCXXXVIII of 2013 on Initiating Referendums, the European Citizens’ Initiative and Referendum Procedure (2013)
ICELAND - Elections Act (2021)
ICELAND - Elections Act (2023)
LITHUANIA - Law on Referendum (2002)
MOLDOVA - Electoral Code (2019)
MOLDOVA - Electoral Code 2016 and 2017 Law for Amending and Completing Certain Legislative Acts (Electoral System for the Election of Parliament) (2017)
REPUBLIC OF MOLDOVA - Electoral Code (2022)
RUSSIAN FEDERATION - Basic Guarantees of Electoral Rights and the Right of Citizens to Participate in a Referendum (2002)
SWITZERLAND - Federal Act on Political Rights (2022)
SWITZERLAND - Federal Act on Political Rights (2015)
THE FORMER YUGOSLAV REPUBLIC OF MACEDONIA - Law on Referendum and Other Forms of Direct Vote of Citizens (2005)
UKRAINE - Law on All-Ukrainian and Local Referendums (1991)
ARMENIA - Joint Opinion on the Draft Law on Referendum (2017)
ARMENIA - Second Opinion on the Draft Amendments to the Constitution (In Particular to Chapters 8, 9, 11 to 16) (2015)
BELGIUM - Opinion on the Revision of the Constitution (2012)
Referendums in Europe - An Analysis of the Legal Rules in European States (2005)
Revised Code of Good Practice on Referendums (2022)
SERBIA - Joint opinion on the constitutional and legal framework governing the functioning of democratic institutions - Electoral law and electoral administration (2022)
SERBIA - Urgent Opinion on the Draft Law on the Referendum and the People's Initiative (2021)
SERBIA - Urgent Opinion on the Draft Law on the Referendum and the People's Initiative (2021)
UKRAINE - Urgent Joint Opinion on the Draft Law 3612 on Democracy Through All-Ukraine Referendum (2020)