1983 Castilian-Leonese regional election

The Cortes of Castile and León were the devolved, unicameral legislature of the autonomous community of Castile and León, having legislative power in regional matters as defined by the Spanish Constitution and the Castilian-Leonese Statute of Autonomy, as well as the ability to vote confidence in or withdraw it from a regional president.[7]

Transitory Provision Second of the Statute established a specific electoral procedure for the first election to the Cortes of Castile and León, to be supplemented by the provisions within Royal Decree-Law 20/1977, of 18 March, and its related regulations. Voting for the Cortes was on the basis of universal suffrage, which comprised all nationals over eighteen, registered in Castile and León and in full enjoyment of their political rights. All members of the Cortes of Castile and León were elected using the D'Hondt method and a closed list proportional representation, with a threshold of three 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. Seats were allocated to constituencies, corresponding to the provinces of Ávila, Burgos, León, Palencia, Salamanca, Segovia, Soria, Valladolid and Zamora, with each being allocated an initial minimum of three seats, as well as one additional member per each 45,000 inhabitants or fraction greater than 22,500.[7][8]

The use of the D'Hondt method might result in a higher effective threshold, depending on the district magnitude.[9]

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 0.1 percent of the electors registered in the constituency for which they sought election—needing to secure, in any case, the signature of 500 electors—. 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 fifteen days of the election being called.[8]

The General Council of Castile and León, in agreement with the Government of Spain, was required to call an election to the Cortes of Castile and León before 31 May 1983. In the event of an investiture process failing to elect a regional president within a two-month period from the first ballot, the Cortes were to be automatically dissolved and a snap election called, with elected deputies merely serving out what remained of their four-year terms.[7]

The poor economic situation of a textile company property of the newly-elected regional president Demetrio Madrid, Pekus, weakened his standing within his party and would eventually lead to Madrid's political downfall.[13] In the years previous to his accession to power, Madrid had saved the company from default by borrowing several loans from the Zamora Provincial Savings Bank.[14] By early 1984, Madrid's debts—amounting to 15 million Pta—resulted in an embargo notice over his patrimony, unraveling a crisis within the regional PSOE as the party was about to hold a regional congress in which Madrid's suitability for the office came under scrutiny in light of a possible conflict of interest.[15][16] On 29 January, a slim majority voted to re-elect Madrid as secretary general,[17][18] but during the following year the political landscape of the autonomous community would become dominated by the PSOE's internal division over Madrid's management and confrontational style.[19][20][21]

In March 1985, amid growing tensions, the PSOE replaced Madrid as their regional secretary general by Juan José Laborda.[22][23] In July 1985, Madrid sold Pekus to stop criticism on the company's dire economic situation,[24] but a lawsuit was filed against him by the company's workers over the alleged fraudulent sale of the firm.[25] Despite Madrid's will to remain in the post and stand as candidate in the 1987 election for a second term in office, the judicial investigation compromised his personal position,[26][27][28] being forced to resign as regional president after his indictment for a societary crime on 29 October 1986,[29][30][31] though he would later be acquitted of any wrongdoing.[32][33] José Constantino Nalda, who served as regional minister of the Presidency and Territorial Administration, was selected to replace Madrid in the post.[34][35][36]

Investiture José Constantino Nalda (PSOE)
Ballot →		14 November 1986
Required majority →		43 out of 84 Y
	Yes • PSOE (41) • Independents (2)	43 / 84
	No • AP–PDP–PL (36) • CDS (1) • Independents (2)	39 / 84
	Abstentions • PANCAL (1)	1 / 84
	Absentees • PSOE (1)	1 / 84
Sources[12][37]