Legal provisions for optional referendums at national level
Estonia
Answer
Yes
Source
Constitution
http://?www.?president.?ee/?en/?republic-?of-?estonia/?the-?constitution/?index.?html
? 106.
Issues regarding the budget, taxation, financial obligations of the state, ratification and denunciation of international treaties, the declaration or termination of a state of emergency, or national defence shall not be submitted to a referendum.
Comment
Any issue can be subject to optional referendum except those excluded in Article 106.
