Protocol Relating to the Status of Refugees the temporal and geographic restrictions. This was needed in the historical context of refugee flows resulting from decolonisation. However, the Protocol gave those states which had previously ratified the 1951 Convention and chosen to use the geographically restricted definition the option to retain that restriction. Protocol Relating to the Status of Refugees The Protocol Relating to the Status of Refugees is a key treaty in international refugee law. It entered into force on 4 October 1967, and 146 countries are parties. Where the 1951 United Nations Convention Relating to the Status of Refugees had restricted refugee status to those whose
International Convention Relating to Intervention on the High Seas in Cases of Oil Pollution Casualties 1969 entering into force in 1975. In 1973 the Protocol relating to Intervention on the High Seas in Cases of Marine Pollution by Substances other than Oil was adopted extending the provision of the 1969 Convention to other hazardous substances. The list of hazardous substances covered by Protocol was amended and extended in 1991, 1996 and 2002. As of October 2016, the convention has 89 state parties. The Convention applies to all seagoing vessels except warships or other vessels owned or operated by a State and used on Government non-commercial service. While exercising the right to take measures "necessary to