This manual is aimed not only at operators of event venues and organizers of large events who employ their own security and order services for their events. It can also be used as a reference work by management and staff of non-commercial security companies for all relevant legal and practical questions related to their security-related responsibilities, as it not only conveys practical-operational knowledge but also takes into account current case law and explains legal contexts. Additionally, the author addresses the increasingly significant topic of countering terrorist threats.