Constitution(was Adopted at National Voting on December 12,1993)

http://www.constitution.ru/en/10003000-01.htm

Federal law “OnBasic Guarantees of Electoral Rights and the Right of Citizens of the RussianFederation to Participate in a Referendum” (as amended on September27, December 24, 2002; June 23, July 4, 2003)

http://www.legislationline.org/documents/id/4170

Federal Constitutional Lawof the Russian Federation “Aboutthe Referendum of the Russian Federation” (As of April 24, 2008)

http://cis-legislation.com/document.fwx?rgn=6629

There areno provisions for mandatory referendums in the legislation of the country