Generally you need to have a minimal number of employees that form the committee of a new union. You register at the Court, inform your employer. Anyone who wan

Generally you need to have a minimal number of employees that form the committee of a new union. You register at the Court, inform your employer. Anyone who wants to be represented by the union can join you. The employer must inform you about organisational changes / salaries / etc. You can add your union to a confederacy of unions, biggest of which has a place at the tripartite table during Labor law updates - so it's the state, employer groups and labor unions deciding about yearly wage increases.