The same year AER launched its first programme, Eurodyssey, designed to promote and encourage youth mobility.

In 1990, AER's Tabula Regionum Europae released the inaugural map depicting Europe not solely as a collection of countries but as regions.

The following year, the principle of subsidiarity emerged as AER's flagship initiative, advocating for the involvement of regions in European and national decision-making.

AER actively contributed to the drafting of the European Constitution, demonstrating strong political involvement.

According to the AER statutes, in principle the term "region" refers to a territorial authority existing at the level immediately below that of the central government, with its own political representation in the form of an elected regional assembly.