At the end of the lecture period in the summer semester 2019, the jurisprudential working group invited to a lecture on industrial action law on 11.7.2019. Prof. Dr. Jürgen Treber, Chairman Judge at the Federal Labour Court and Honorary Professor at the University of Trier, first offered a clear overview of the basics of industrial action law and then transferred it to a current case from the BAG jurisdiction on strike mobilisation on the company premises. The subsequent debate provided an opportunity for an in-depth discussion of individual issues in this ever-changing field of law.