As the UK has no written constitution, legislation is the primary tool for establishing anti-discrimination law in the UK. The UK has ratified all the major international human rights treaties, including the European Convention on Human Rights, the UN Covenants, CEDAW, CERD, the Convention Against Torture and the Convention on the Rights of the Child. It has also ratified the main Council of Europe human rights instruments, including the ECHR, the Charter on Minority Languages and the Convention on Minority Rights. International treaties are not directly applicable in UK law unless incorporated by an Act of Parliament, so offer little protection against discrimination in domestic law, although they can be used to interpret legislation in certain circumstances.