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Former member and former president of the
International Law Commission
Chairman (1997-1998)
Member (1990-2011)
Member of the Editorial Board (1991, 1993 – 1996, 1998, 2000, 2001, 2003, 2007, 2008)
Chairman of the working group on the United Nations Decade of International Law (1992 – 1999)
Chairman of the Long-Term Program Working Group (2002-2006)
Chairman of the Working Group on Unilateral Acts (1998-2006)
Chairman of the working group on the obligation to extradite or prosecute (aut dedere aut judicare) (2008 – 2011)
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