Ibiza (Parliament of the Balearic Islands constituency) four main islands in the Balearic archipelago—Majorca, Menorca, Ibiza and Formentera—to be established as multi-member districts in the Parliament of the Balearic Islands, with this regulation being maintained under the 1986 regional electoral law. Each constituency is allocated a fixed number of seats: 33 for Majorca, 13 for Menorca, 12 for Ibiza and 1 for Formentera. The exception was the 1983 election, when these numbers were 30, 12, 11 and 1, respectively. Voting is on the basis of universal suffrage, which comprises all nationals over eighteen, registered in the Balearic Islands and in full enjoyment of their political rights. Amendments
Balearic Islands declined between 2007 and 2017 while the largest-increasing populations were the Moroccans, Italians, and Romanians. Each one of the three main islands is administered, along with its surrounding minor islands and islets, by an insular council ("consell insular" in Catalan) of the same name. These four insular councils are the first level of subdivision in the autonomous community (and province) of the Baleares. Before the administrative reform of 1977, the two insular councils of Ibiza and Formentera were forming in a single one (covering the whole group of the Pitiusic Islands). This level is further subdivided into six comarques only