The European Social Charter of 1961 guarantees several social and economic rights and was intended to complement the European Convention on Human Rights. It does not have a specific provision on equal treatment or non-discrimination, however the Preamble says, "the enjoyment of social rights should be secured without discrimination on grounds of race, colour, sex, religion, political opinion, national extraction or social origin." Article 4(3) guarantees the principle of equal pay for work of equal value as between men and women and Article 8 guarantees protection of the rights of employed women. Under Article 15, disabled people have a right to vocational training, rehabilitation and social resettlement.