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

Latvia
Answer
- Constitutional amendments
- Adoption of international treaties
- Transfer of authority to international bodies
- Dissolution of the Parliament
Source
Constitution of the Republic of Latvia (lastamended in 2005); Articles 77 and 70
http://www.wipo.int/wipolex/en/text.jsp?file_id=190856
Law on National Referendums, Legislative Initiativesand European Citizens’ Initiative (lastamended in 2012); Articles 1, 5 and 11.