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

Turkmenistan
Constitution 2008
http://legislationline.org/documents/section/constitutions/country/51
Article 57: The President of Turkmenistan may be prematurelyreleased from his duty in case of his inability to fulfill his duties becauseof illness. The Mejlis, on the recommendation of an independent medical boardcreated by it, may decide to release the President from the office. Suchdecision is taken by at least two-third vote of the established members of theMejlis.
In case of violation of the Constitution and laws ofTurkmenistan by the President of Turkmenistan, the parliament may express noconfidence in him. The issue of no-confidence can be considered at the requestof no less than two-thirds of the established members of the Mejlis. Thedecision of no confidence is adopted by at least three-fourth of theestablished members of the Mejlis. The question for removal of President of Turkmenistan from theoffice is put on national referendum.