Between 1971 and 1974, a group of 15 nuclear supplier states held a series of informal meetings in Vienna chaired by Professor Claude Zangger of Switzerland. The group's objective was to reach a common understanding on: (a) the definition of "equipment or material especially designed or prepared for the processing, use or production of special fissionable material;" and (b) the conditions and procedures that would govern exports of such equipment or material in order to meet the obligations of Article III.2 on the basis of fair commercial competition. The group, which became known as the Zangger Committee, decided that it would be informal and that its decisions would not be legally binding upon its members.