The legal status of the Universal Declaration of Human Rights, which was subject to controversy at the time it was adopted, has evolved since then. At the international level, the Universal Declaration has become part of the United Nations legal corpus and has been recognized as a binding instrument by publicists and judicial and quasi-judicial bodies. At the national level, it has been incorporated into many domestic legal systems following dynamics related to four trans-regional areas (Common Law, Latin America, Europe and Africa). This double evolution has changed the intrinsic status of the UDHR, which is now part of the non-conventional sources of mandatory law, though some legal systems deny its binding force. Its applicability is therefore based on the formulation of the rights it contains.