One of the principal achievements of UNCTAD (1964) has been to conceive and implement the Generalised System of Preferences (GSP). It was argued in UNCTAD that to promote exports of manufactured goods from developing countries, it would be necessary to offer special tariff concessions to such exports. Accepting this argument, the developed countries formulated the GSP scheme under which manufacturers' exports and import of some agricultural goods from the developing countries enter duty-free or at reduced rates in the developed countries. Since imports of such items from other developed countries are subject to the normal rates of duties, imports of the same items from developing countries would enjoy a competitive advantage.