The constituency was created as per the Statute of Autonomy of Extremadura of 1983 and was first contested in the 1983 regional election. The Statute provided for the two provinces in Extremadura—Badajoz and Cáceres—to be established as multi-member districts in the Assembly of Extremadura, with this regulation being maintained under the 1987 regional electoral law. Each constituency is entitled to an initial minimum of 20 seats, with the remaining 25 being distributed in proportion to their populations. The exception was the 1983 election, when each constituency was allocated a fixed number of seats: 35 for Badajoz and 30 for Cáceres.[2][3][4]
Voting is on the basis of universal suffrage, which comprises all nationals over eighteen, registered in Extremadura and in full enjoyment of their political rights. Amendments to the electoral law in 2011 required for Extremadurans abroad to apply for voting before being permitted to vote, a system known as "begged" or expat vote (Spanish: Voto rogado).[5] Seats are elected using the D'Hondt method and a closed listproportional representation, with an electoral threshold of five percent of valid votes—which includes blank ballots—being applied in each constituency. Alternatively, parties failing to reach the threshold in one of the constituencies are also entitled to enter the seat distribution as long as they run candidates in both districts and reach five percent regionally.[2][3][4]
The electoral law allows for parties and federations registered in the interior ministry, coalitions and groupings of electors to present lists of candidates. Parties and federations intending to form a coalition ahead of an election are required to inform the relevant Electoral Commission within ten days of the election call—fifteen before 1985—whereas groupings of electors need to secure the signature of at least two percent of the electorate in the constituencies for which they seek election—one-thousandth of the electorate, with a compulsory minimum of 500 signatures, until 1985—disallowing electors from signing for more than one list of candidates.[4][6][7]
2United Left–Independent Socialists of Extremadura results are compared to the combined totals of United Left–Commitment to Extremadura and Independent Socialists of Extremadura in the 1999 election.
^"Cifras oficiales de población resultantes de la revisión del Padrón municipal a 1 de enero. Población por provincias y por sexo". ine.es (in Spanish). National Institute of Statistics. Retrieved 8 February 2020.
^ a bLey Orgánica 1/1983, de 25 de febrero, de Estatuto de Autonomía de Extremadura. Boletín Oficial del Estado (Organic Law 1) (in Spanish). 25 February 1983. Retrieved 17 March 2017.
^ a bLey Orgánica 1/2011, de 28 de enero, de reforma del Estatuto de Autonomía de la Comunidad Autónoma de Extremadura. Boletín Oficial del Estado (Organic Law 1) (in Spanish). 28 January 2011. Retrieved 17 March 2017.
^ a b cLey 2/1987, de 16 de marzo, de Elecciones a la Asamblea de Extremadura. Boletín Oficial del Estado (Law 2) (in Spanish). 16 March 1987. Retrieved 17 March 2017.
^Reig Pellicer, Naiara (16 December 2015). "Spanish elections: Begging for the right to vote". cafebabel.co.uk. Retrieved 17 July 2017.
^Real Decreto-ley 20/1977, de 18 de marzo, sobre Normas Electorales. Boletín Oficial del Estado (Royal Decree-Law 20) (in Spanish). 18 March 1977. Retrieved 14 December 2019.
^Ley Orgánica 5/1985, de 19 de junio, del Régimen Electoral General. Boletín Oficial del Estado (Organic Law 5) (in Spanish). 19 June 1985. Retrieved 30 January 2020.
^"Acuerdo de 7 de junio de 2023, de la Junta Electoral de Extremadura, por la que se hacen públicos los resultados del escrutinio general y proclamación de diputados y diputadas electos a la Asamblea de Extremadura" (PDF). Diario Oficial de Extremadura (in Spanish) (112). Junta de Extremadura: 36880–36885. 13 June 2023. OCLC 796228808.
^"Assembly of Extremadura election results, 26 May 2019" (PDF). www.juntaelectoralcentral.es (in Spanish). Electoral Commission of Extremadura. 10 June 2019. Retrieved 29 November 2019.
^"Assembly of Extremadura election results, 24 May 2015. Badajoz" (PDF). www.juntaelectoralcentral.es (in Spanish). Electoral Commission of Extremadura. 10 June 2015. Retrieved 26 September 2017.
^"Assembly of Extremadura election results, 22 May 2011. Badajoz and Cáceres" (PDF). www.juntaelectoralcentral.es (in Spanish). Electoral Commission of Extremadura. 3 June 2011. Retrieved 26 September 2017.
^"Assembly of Extremadura election results, 27 May 2007. Badajoz and Cáceres" (PDF). www.juntaelectoralcentral.es (in Spanish). Electoral Commission of Extremadura. 7 June 2007. Retrieved 26 September 2017.
^"Assembly of Extremadura election results, 25 May 2003. Badajoz and Cáceres" (PDF). www.juntaelectoralcentral.es (in Spanish). Electoral Commission of Extremadura. 5 June 2003. Retrieved 26 September 2017.
^"Assembly of Extremadura election results, 13 June 1999. Badajoz and Cáceres" (PDF). www.juntaelectoralcentral.es (in Spanish). Electoral Commission of Extremadura. 26 June 1999. Retrieved 26 September 2017.
^"Assembly of Extremadura election results, 28 May 1995. Badajoz and Cáceres" (PDF). www.juntaelectoralcentral.es (in Spanish). Electoral Commission of Extremadura. 10 June 1995. Retrieved 26 September 2017.
^"Assembly of Extremadura election results, 26 May 1991. Badajoz and Cáceres" (PDF). www.juntaelectoralcentral.es (in Spanish). Electoral Commission of Extremadura. 13 June 1991. Retrieved 26 September 2017.
^"Number 152. Report-declaration of the Assembly of Extremadura election of 26 May 1991" (PDF). tcu.es (in Spanish). Court of Auditors. Retrieved 8 December 2019.
^"Assembly of Extremadura election results, 10 June 1987. Badajoz and Cáceres" (PDF). www.juntaelectoralcentral.es (in Spanish). Electoral Commission of Extremadura. 21 July 1987. Retrieved 26 September 2017.
^"Number 75. Audit report on the regularity of electoral accounting derived from the elections held on June 10, 1987" (PDF). tcu.es (in Spanish). Court of Auditors. Retrieved 8 December 2019.
^"Assembly of Extremadura election results, 8 May 1983. Badajoz and Cáceres" (PDF). www.juntaelectoralcentral.es (in Spanish). Central Electoral Commission. 12 September 1983. Retrieved 26 September 2017.