The Office of the United Nations High Commissioner for Refugees (UNHCR) states,
"Grounded in Article 14 of the Universal Declaration of human rights 1948, which recognizes the right of persons to seek asylum from persecution in other countries, the United Nations Convention relating to the Status of Refugees, adopted in 1951, is the centrepiece of international refugee protection today. The Convention entered into force on 22 April 1954, and it has been subject to only one amendment in the form of a 1967 Protocol, which removed the geographic and temporal limits of the 1951 Convention. The 1951 Convention, as a post-Second World War instrument, was originally limited in scope to persons fleeing events occurring before 1 January 1951 and within Europe. The 1967 Protocol removed these limitations and thus gave the Convention universal coverage. It has since been supplemented by refugee and subsidiary protection regimes in several regions, as well as via the progressive development of international human rights law."