Legal provisions for mandatory referendums at national level

Bermuda
Answer
No
Source
Constitution
http://www.legislation.gov.uk/uksi/2003/456/body/made
Referendum Act, 2012
http://www.bermudalaws.bm/Laws/Consolidated%20Laws/Referendum%20Act%202012.pdf
Comment
There areno provisions for mandatory referendums in the legislation of the country