The subject of this final work is representative of workers in the authority of the employer , a better knowledge of the rights of workers and their capabilities . Workers' rights are regulated in the Croatian Constitution and numerous universal sources of labor law and the rights of occupational safety and health , but also in the principles of modern , and modern labor law . Among the most important principles are unavoidable : the principle of the protection of peo-ple - workers and protection of rights at work and related to work . We will introduce the principles of labor law and each one of them in particular to explain , to understand in more detail the rights of workers. What exactly is the representative of workers in the authority employers , how employer cho-ose them, what happens if the workers' representative is not elected , and whether it brings some kind of changes in workers, what are the differences between old and new Labour Act and whether those influences to workers' rights.