Decides to convene, in the period between September 1979 and April 1980, under the auspices of the United Nations Conference on Trade and Development, a United Nations Conference on Restrictive Business Practices to negotiate, on the basis of the work of the Third Ad Hoe Group of Experts, and to take all decisions necessary for the adoption of, a set of multilaterally agreed equitable principles and rules for the control of restrictive business practices having adverse effects on international trade, particularly that of developing countries, and on the economic development of those countries, including a decision on the legal character of the principles and rules;