1987 Extremaduran regional election

The Assembly of Extremadura was the devolved, unicameral legislature of the autonomous community of Extremadura, having legislative power in regional matters as defined by the Spanish Constitution and the Extremaduran Statute of Autonomy, as well as the ability to vote confidence in or withdraw it from a President of the Regional Government.[1] Voting for the Assembly was on the basis of universal suffrage, which comprised all nationals over eighteen, registered in Extremadura and in full enjoyment of their political rights.

The 65 members of the Assembly of Extremadura were elected using the D'Hondt method and a closed list proportional representation, with a threshold of 5 percent of valid votes—which included blank ballots—being applied in each constituency. Parties not reaching the threshold were not taken into consideration for seat distribution. Alternatively, parties failing to reach the threshold in one of the constituencies would also be entitled to enter the seat distribution as long as they ran candidates in both districts and reached 5 percent regionally. Seats were allocated to constituencies, corresponding to the provinces of Badajoz and Cáceres. Each constituency was entitled to an initial minimum of 20 seats, with the remaining 25 allocated among the constituencies in proportion to their populations.[1][2]

The electoral law provided that parties, federations, coalitions and groupings of electors were allowed to present lists of candidates. However, groupings of electors were required to secure the signature of at least 2 percent of the electors registered in the constituency for which they sought election. Electors were barred from signing for more than one list of candidates. Concurrently, parties and federations intending to enter in coalition to take part jointly at an election were required to inform the relevant Electoral Commission within ten days of the election being called.[2][3][4]

The term of the Assembly of Extremadura expired four years after the date of its previous election. The election Decree was required to be issued no later than the twenty-fifth day prior to the date of expiry of parliament and published on the following day in the Official Journal of Extremadura, with election day taking place between the fifty-fourth and the sixtieth day from publication and set so as to make it coincide with elections to the regional assemblies of other autonomous communities. The previous election was held on 8 May 1983, which meant that the legislature's term would have expired on 8 May 1987. The election Decree was required to be published no later than 14 April 1987, with the election taking place no later than the sixtieth day from publication, setting the latest possible election date for the Assembly on Saturday, 13 June 1987.[1][2][3][4]

The Assembly of Extremadura could not be dissolved before the date of expiry of parliament except in the event of an investiture process failing to elect a regional President within a two-month period from the first ballot. In such a case, the Assembly was to be automatically dissolved and a snap election called, with elected deputies merely serving out what remained of their four-year terms.[1]