Provenance provenance of paintings can help resolve ownership disputes. For example, provenance between 1933 and 1945 can determine whether a painting was looted by the Nazis. Many galleries are putting a great deal of effort into researching the provenance of paintings in their collections for which there is no firm provenance during that period. Documented evidence of provenance for an object can help to establish that it has not been altered and is not a forgery, a reproduction, stolen or looted art. Provenance helps assign the work to a known artist, and a documented history can be of use in helping
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