Please read and notice the word jointly. 

(taken from: http://ec.europa.eu/justice_home/news/events/events_2008_en.htm)

European Hearing: "Crimes Committed by Totalitarian Regimes"
On 8 April 2008 a European Hearing entitled "crimes committed by totalitarian regimes" took place in Brussels. This was organised jointly by the Slovenian Presidency of the European Union and the European Commission around the two key issues of recognition of the crimes and reconciliation.