Issues in relation to which referendums are optional at the national level

Andorra
Constitutionof the Principality of Andorra
Article45
TheCoprinces, with the countersignature of the Head of Government, or whenappropriate, of the Syndic General, have the political responsibility for:
b)Calling a referendum in accordance with articles 76 and 106 of theConstitution.
Article76
TheHead of Government, with the approval of the majority of the General Council,may request the Coprinces to call a referendum on political matters.
Qualified Law 28/2007, of November 22, amendingQualified Law on the Electoral System and Referendum
ChapterTwo. The advisory referendum
Article72. Call for advisory referendum
Thehead of the Government shall request the co-princes to call a referendum onpolitical matters, when its holding is approved in accordance with theprovisions of the Constitution.