Working life regulation is based on a multilayered norm system. There are multiple regulatory actors from international level to the single enterprise. These actors regulate labour law issues, based on their competences. There are similarly multiple actors as regards the interpretation of norms. Different actors like courts, enforcement authorities, social partners and single employers interpret individual norms. The multilayered norm system with multiple actors constitutes a broad and complex research area. The aim of our research is to increase and update understanding of current labour law norms, institutions, doctrines and the interaction mechanisms between various subsystems and related actors and to analyze them from a systematic perspective.