Santa Cruz is represented in the Plurinational Legislative Assembly by four senators and their alternates elected through proportional representation. They serve five-year terms and qualify for reelection once. The current delegation is composed of two senators from Creemos and two senators from the Movement for Socialism: Centa Rek, Henry Montero, Soledad Flores, and Isidoro Quispe. Their respective alternates are: Erik Morón, Paola Fernández, William Torrez, and María Muñoz.
Even though the bicameral system was adopted in the 1831 Constitution and continued in subsequently promulgated constitutions, it can be affirmed that, with the exception of very small intervals, the Senate did not, in fact, exercise its functions until the convocation of the 1882 legislature. Furthermore, due to heavy political instability and frequent military interventions since 1882, Bolivia did not experience a continuous, uninterrupted, legislative session until 1982.
List of senators Legislature . Term of office Titular Senator Party Alternate Senator Term of office . . Took office Left office Took office Left office . . 1979–1980 1° 1 August 1979 17 July 1980 Pedro Maillard MNR 1 August 1979 17 July 1980 1979 2° 1 August 1979 17 July 1980 Miguel Trigo MNR 1 August 1979 17 July 1980 1° 1 August 1979 17 July 1980 Edil Sandóval MNRI 1 August 1979 17 July 1980 1982–1985 1° 4 October 1982 6 August 1985 Pedro Maillard MNR 4 October 1982 6 August 1985 1980 2° 4 October 1982 6 August 1985 Jorge Antelo MNR 4 October 1982 6 August 1985 1° 4 October 1982 6 August 1985 Heberto Castedo ADN 4 October 1982 6 August 1985 1985–1989 1° 6 August 1985 6 August 1989 Edil Sandóval M-XX 6 August 1985 6 August 1989 1985 2° 6 August 1985 6 August 1989 Carmelo Caballero MNR 6 August 1985 6 August 1989 1° 6 August 1985 6 August 1989 Heberto Castedo ADN 6 August 1985 6 August 1989 1989–1993 1° 6 August 1989 6 August 1993 Juan Carlos Durán MNR 6 August 1989 6 August 1993 1989 2° 6 August 1989 6 August 1993 Enrique Quintela MNR 6 August 1989 6 August 1993 1° 6 August 1989 6 August 1993 Jorge Landívar ADN 6 August 1989 6 August 1993 1993–1997 1° 6 August 1993 6 August 1997 Juan Carlos Durán MNR Julio Leigue 6 August 1993 13 August 1993 1993 Vacant 13 August 1993 6 August 1997 2° 6 August 1993 6 August 1997 Osvaldo Monasterio MNR Mario Barbery 6 August 1993 6 August 1997 1° 6 August 1993 6 August 1997 Jorge Landívar ADN Zvonko Matkovic Fleig 6 August 1993 6 August 1997 1997–2002 1° 6 August 1997 21 June 1999 Rubén Poma UCS Roberto Caballero 6 August 1997 21 June 1999 1997 21 June 1999 6 August 2001 Roberto Caballero UCS Vacant21 June 19996 August 2001 6 August 2001 2 August 2002 Rubén Poma UCS Roberto Caballero 6 August 2001 2 August 2002 2° 6 August 1997 2 August 2002 Justo Yépez UCS Lourdes Pantoja 6 August 1997 2 August 2002 1° 6 August 1997 2 August 2002 Freddy Teodovich MNR Julio Leigue 6 August 1997 2 August 2002 2002–2006 1° 2 August 2002 6 August 2002 Guillermo Justiniano MNR Joaquín Monasterio 2 August 2002 6 August 2002 2002 6 August 2002 17 October 2003 Joaquín Monasterio MNR Vacant6 August 200217 October 2003 17 October 2003 22 January 2006 Guillermo Justiniano MNR Joaquín Monasterio 17 October 2003 22 January 2006 2° 2 August 2002 9 August 2002 Mario Justiniano MNR Helen Hayes 2 August 2002 9 August 2002 9 August 2002 22 January 2006 Helen Hayes MNR Vacant9 August 200222 January 2006 1° 2 August 2002 22 January 2006 Hormando Vaca Díez MIR Oswaldo Justiniano 2 August 2002 22 January 2006 2006–2009 1° 22 January 2006 19 January 2010 Óscar Ortiz Antelo PDMS María Silvia Baldomar 22 January 2006 19 January 2010 2005 2° 22 January 2006 19 January 2010 Jorge Aguilera PDMS Bonifacio Barrientos 22 January 2006 19 January 2010 1° 22 January 2006 19 January 2010 Guido Guardia MAS Carlos Cuasace 22 January 2006 19 January 2010 2010–2014 1° 19 January 2010 18 January 2015 Germán Antelo NPC María Elva Pinckert 19 January 2010 10 July 2014 2009 Vacant 10 July 2014 25 July 2014 Fátima Doly Velarde 25 July 2014 18 January 2015 2° 19 January 2010 18 January 2015 Centa Rek NPC Victor Hugo Mayser 19 January 2010 18 January 2015 1° 19 January 2010 14 July 2014 Gabriela Montaño MAS Félix Martínez 19 January 2010 28 July 2014 14 July 2014 28 July 2014 Vacant MAS 28 July 2014 18 January 2015 Félix Martínez Vacant 28 July 2014 18 January 2015 2° 19 January 2010 18 January 2015 Isaac Ávalos MAS Amalia Sarabia 19 January 2010 18 January 2015 2014–2020Titular senators were sworn in 18 January 2015:
Alternate senators were sworn in 23 January 2015: 1° 18 January 2015 26 May 2015 Carlos Romero MAS Adriana Salvatierra 23 January 2015 26 May 2015 2014 26 May 2015 3 November 2020 Adriana Salvatierra MAS Vacant 26 May 2015 1 September 2015 Juan José Ric 1 September 2015 3 November 2020 2° 18 January 2015 3 November 2020 Felipa Merino MAS Anderson Cáceres 23 January 2015 3 November 2020 1° 18 January 2015 8 May 2020 Óscar Ortiz Antelo MDS María Lourdes Landívar 23 January 2015 8 May 2020 8 May 2020 1 June 2020 Vacant MDS 1 June 2020 3 November 2020 María Lourdes Landívar Vacant 1 June 2020 3 November 2020 2° 18 January 2015 13 November 2019 María Elva Pinckert MDS Carlos Pablo Klinsky 23 January 2015 16 January 2020 13 November 2019 16 January 2020 Vacant MDS 16 January 2020 3 November 2020 Carlos Pablo Klinsky Vacant 16 January 2020 3 November 2020 2020–2025Titular senators were sworn in 3 November:
Alternate senators were sworn in 9 November: 1° 3 November 2020 Incumbent Centa Rek CRMS Vacant 9 November 2020 19 November 2020 2020 Zvonko Matkovic 19 November 2020 21 January 2021 Vacant 21 January 2021 28 April 2021 Erik Morón 28 April 2021 Incumbent 2° 3 November 2020 Incumbent Henry Montero CRMS Paola Fernández 9 November 2020 Incumbent 1° 3 November 2020 Incumbent Soledad Flores MAS William Torrez 9 November 2020 Incumbent 2° 3 November 2020 Incumbent Isidoro Quispe MAS María Muñoz 9 November 2020 Incumbent
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