Regulations in community legislation concerning collective employment law are mostly limited to the establishment of the right to information and consultation for employee representatives in companies and corporations. Conversely, collective bargaining and industrial action law have long remained largely unaffected, because of the still unclear delimitation of competences between the community and the member states in this area. With the entry into force of the Charter of Fundamental Rights, the Union has recognized the fundamental right to form and operate a coalition. By referring to the instruments of the Council of Europe (Human Rights Convention and Social Charter), the Charter makes it possible for international labour law to have a greater influence on the Union’s legal order. This provides an opportunity for a systematic discussion of the relationship between Union law and international labour law, accompanied by a discussion of the influences of these legal sources on national law. Apart from individual publications on the subject, the first comprehensive and systematic presentation of international labour law was published by Mohr Siebeck in 2019: Heuschmid/ Schlachter/ Ulber (Hrsg.), Arbeitsvölkerrecht, Mohr Siebeck, Tübingen 2019.