Who can initiate an optional referendum at the national level?

Lithuania
- Legislative minority
- Registered electors
REFERENDUMLAW
(Adopted 2002; lastamended 2012)
http://www3.lrs.lt/pls/inter3/dokpaieska.showdoc_e?p_id=437744
Article 9. Rightof Initiative of Calling Referendum
1. The right of initiative of calling a referendumshall belong to the citizens and the Seimas.
2. The citizens’ right of calling a referendum shallbe conducted through the petition of 300 thousand citizens who are eligible.
3. A group comprising at least one-fourth of theSeimas Members may submit to the Seimas a proposal to call a referendum. Adecision on this proposal shall be adopted in accordance with the procedure setforth by the Seimas Statute.