Article 168 of the 2009 constitution allowed the president and vice-president to be re-elected only once, limiting the number of terms to two. The governing party, the Movement for Socialism (MAS) sponsored an effort to amend this article. The referendum was authorized by a joint session of the Plurinational Legislative Assembly on 26 September 2015, by a vote of 112 to 41. Law 757, which convened the February referendum, passed by 113 votes to 43 and was promulgated on 5 November 2015.
