The General Assembly, comprising all full members in full exercise of their rights, is the highest governing body of the Association, and its resolutions, when validly approved, are binding on all members, including those who are absent. It is composed of one representative from each orchestra, preferably the manager or other similar officer, who may be accompanied by another representative from the orchestra.

The General Assembly of the AEOS meets twice year to discuss matters of governance of the association, matters of shared interest, the promotion of research into orchestras, and relevant questions for the orchestra sector at a national or international level.