What type of institution/course must accept or enrol the applicant?
The class must include pupils of various nationalities, and the school must be either a state or state-recognised school with an international orientation, or a school not (primarily) publicly funded that prepares pupils for international, foreign or state-recognised qualifications.
See recorded sources
Limits of the record- AufenthG cited from the official English translation current to the Act of 8 May 2024; later amendments not reflected and the German text governs
- https://www.gesetze-im-internet.de/englisch_aufenthg/englisch_aufenthg.html
provided it is guaranteed that the school class comprises pupils of various nationalities and that the school
1. is a state or state-recognised school with an international orientation or
2. is a school which is not or not primarily funded from public funds and prepares pupils for international qualifications, qualifications issued by other countries or state-recognised qualifications.