Issues in relation to which referendums are optional at the national level
Zimbabwe
Answer
Any issue of national importance
Source
Referendums Act Chapter 2:10(1999)http://aceproject.org/regions-en/eisa/ZW/Referendums%20Act%20Chapter%202%2010.pdf
Article 3Whenever the President considers it desirable to ascertain the view of voters on any question or issue, he may by proclamation in the Gazette:
(a) declare that a referendum is to be held in order to ascertain the view ofvoters on that question or issue.
