Legislation that limits the right of workers to bargain collectively violates international law, the human rights group Amnesty International said today. Under international law, all workers have a human right to organize and to bargain collectively. These rights are an essential foundation to the realization of other rights, and are enshrined in the Universal Declaration of Human Rights, the International Covenant on Civil and Political Rights (ICCPR), the International Covenant on Economic Social and Cultural Rights (ICESCR) and the Rights of All Migrant Workers and Members of their Families, as well as conventions adopted by the International Labour Organization (ILO)