Legal provisions for mandatory referendums at national level

Zimbabwe
Answer
No
Source
Referendums Act Chapter 2:10 (1999)
http://aceproject.org/regions-en/eisa/ZW/Referendums%20Act%20Chapter%202%2010.pdf
Constitution (2013) http://www.swradioafrica.com/Documents/Final%20draft%20Constitution%2025%20January%202013.pdf
Comment
There are no provisions for mandatory referendums in the legislation of the country