What did Aruba’s autonomous status in 1986 change about its relationship with the Netherlands Antilles?

Aruba’s autonomous status in 1986 fundamentally changed its relationship with the Netherlands Antilles by allowing the island to secede from the Antilles federation.12

Prior to this change, Aruba had been politically subordinated to the federation's main island, Curaçao. The movement for autonomy, led by the People’s Electoral Movement, was driven by a desire to break away from this Curaçaoan domination rather than from the Netherlands itself. While Aruba formally achieved this separate status within the Kingdom of the Netherlands in 1986, it chose to remain part of the kingdom rather than pursue full independence.213