On June 14, 1982, in the new Castle of Manzanares el Real, the act of constitution of the Mixed Assembly of Deputies took place, in which the drafting paper of the draft Madrid Statute of Autonomy was presented. national deputies, senators and provincial deputies and elected Senator José Prat as president. On June 26, 1982, the Assembly of Parliamentarians for Madrid and provincial deputies unanimously approved the text of the Statute of Autonomy. However, the processing periods in the Cortes Generales are longer than expected as a result of the end of the First Legislature and the holding of the general elections on October 28, 1982. Due to this, the project is not debated in the Congress of Deputies until January 25, 1983 and in the Senate, six days later. 16 amendments to the text were presented, which would be accepted in the session of January 27, 1983. The bill is definitively approved by the Lower House on February 22 of that same year.3

It was sanctioned by Juan Carlos I of Spain on February 25, 1983 by Organic Law 3/1983 and the signing took place in the same castle where it was drawn up. Finally, the statute came into force on March 1, 1983. This meant In practice, the Community of Madrid would assume the competences and patrimonial assets of the Provincial Council and would have a voice and vote in the Council of Fiscal and Financial Policy. The organizations of the Community of Madrid were constituted after the first regional elections of 8 May and finally, on June 16, 1983, the Provincial Council disappeared as such. The first transfers took place on June 25. The text had sixty-four articles, two additional provisions, seven transitory and one final.7 It has the character of an organic law, like the rest of the statutes of autonomy in Spain .

Since its promulgation it has been amended four times: in 1991, in 1994, in 1998, and the Modification of Law 8/2012, of December 28, on Fiscal and Administrative Measures.

In 2018, a process for a new reform began, in which the possibility of eliminating surveys, increasing the number of districts, setting a maximum of two terms for the regional president and reducing the number of deputies, among other changes, was started. .8Finally, this reform was not carried out.