In 1977 the World Health Organization recommended that every country throughout the world should have a national plan for child mental health. The United Nations Convention on the Rights of the Child has been another important stimulus for child mental health policies and services in many countries. Adopted unanimously by the United Nations General Assembly in 1989 and instituted as international law in 1990, the Convention is an agreement on the basic protections that should be accorded to children. Adopted in 1961, the European Social Charter is the major European treaty that secures children's rights. In 1996 the Charter was revised and expanded to include a list of core obligations of the contracting parties relating to the recognition of social, legal and economic rights for children and young persons.