The area of posting workers between EU/EEA Member States is tied to international and national legal bases, which regulate basic rights and obligations of participating parties. Labour law is traditionally a part of autonomous regulations by individual Member States, but the level of protection of workers differs among Member States. With the goal of harmonisation of regulations regarding minimum protection of workers, employers and users, the European Parliament and Council adopted Directive 96/71/ES and Directive 2014/67/EU in the field of posting workers and some other provisions. If, in the time of posting a worker to work in another Member State, the legislation of the country of origin with a lower level of the workers’ rights protection continued to be used, this could consequently give a foreign service provider a competitive advantage over local service providers.