The European Directive (2018/957/EU) to change the directive on posted workers from 1996 (European directive 96/71/EG) was decided in summer 2018. The directive aims to improve the protection of workers posted from one EU Member State to work in another EU Member State. The changes are to be put into practice in national law by all EU countries by July 2020. Dr. Thomas Klein and Alexander Schneider have investigated the revision on European level thoroughly and published their finding in this year’s first issue of the magazine Soziales Recht (SR 01/2019, p. 21-36). In the second part of the investigation, which has been published in the following issue of the mentioned magazine, Dr. Klein and Alexander Schneider present the effects of the changed directive on German laws and offers suggestions for realisations of the directive. The article has already attracted keen interest in the topic (i.e. Zimmer, Arbeit und Recht (AuR) 2019, p. 152 ff.) and may attract even more attention within the framework of the pending legislative procedures to implement the changes in the employee secondment law. Moreover, other countries might find the article just as relevant since Klein and Schneider do not only see design possibilities for the employee secondment law, but also for a new fundament of the tariff loyalty clauses of the countries’ procurement laws.