The Expert Group Workshop on International Environmental Law Aiming at Sustainable DeveLopment was eonvened by the United Nations Environment, Programme (UNEP) in collaboration with the Center for International Environmental Law (CIEL) and the American University's Washington College of Law pursuant, to UNEP Governing Council decisions 17/25 and 18/9 with the purpose to provide expert advice regarding the mid-term review of the UNEP Programme for the Development and Periodic Review of International Environmental- Law for the 1990's (Montevideo Programme II) requested by decision 17 /25, and, in the process of preparation for this review, to contribute to the development of a position paper for international environmental l-aw aiming at sustainable development (position Paper) and of a study on Èhe need for and feasibility of new international environmental instruments aiming at sustainable development (Feasibility Study), both requested by decision 18/9. The Workshop consisted of senior academic and governmental lawyers from different regions acting in their personal capacity.