German Public Auditors and German Sworn Auditors (Berufssatzung für Wirtschaftsprüfer und vereidigte Buchprüfer) as well as the Quality Assurance Standard: Quality Assurance Requirements in Audit Practices (IDW QS promulgated by the Institut der Wirtschaftsprüfer (IDW), which comply with the International Standard on Quality Control 1 (ISQC 1) issued by the International Auditing and Assurance Standards Board (IAASB).