The Constitution, in Article 42, guarantees the freedom of association, except on grounds of security, public safety and the protection against the spread of infectious diseases.Registration of CSOs is reported to be simple and inexpensive, and based on clear and fair criteria. There are assessed to be 26,000 registered CSOs, one of the highest global rates per capita. The right to join trade unions and engage in trade union activity is respected, and the Association of Free Trade Unions of Slovenia has around 300,000 members. The Act on Volunteering was amended in 2015 to remove some key barriers against volunteering.