Although torture is sanctioned by some states, it is prohibited under international law and the domestic laws of most countries. Although widely illegal and reviled, there is an ongoing debate as to what exactly is and is not legally defined as torture. It is a serious violation of human rights, and is declared to be unacceptable (but not illegal) by Article 5 of the UN Universal Declaration of Human Rights. Signatories of the Geneva Conventions of 1949 and the Additional Protocols I and II of 8 June 1977 officially agree not to torture captured persons in armed conflicts, whether international or internal. Torture is also prohibited for the signatories of the United Nations Convention Against Torture, which has 163 state parties.