Section 2 Article 26 of the Constitution grants the right for universal suffrage for all people (Constitute Project, “Bolivia’'s Constitution of 2009”). According to the Inter-Parliamentary Union, the right to vote was extended to women in 1952.

References:

“Bolivia (Plurinational Republic of) 2009.” Constitute. https://www.constituteproject.org/constitution/Bolivia_2009

Inter-Parliamentary Union, "Women's Suffrage": http://archive.ipu.org/wmn-e/suffrage.htm