Articles of Association
Articles of Association / Rules of Procedure
§ 23 of the German Stock Corporation Act (AktG) stipulates that stock corporations must have articles of association that can only be amended by a resolution of the Annual General Meeting.
You can download the complete version of the Articles of Association as of August 28, 2017 here (in German language):
Geschäftsordnung mit Stand vom 28.08.2017