The contribution of parliaments to the achievement of fair international trade in all its aspects, including trade in agricultural products ; the elimination of tariff and other barriers ; a better understanding of the socio-economic impact of protectionism in particular on the developing countries : resolution / adopted without a vote by the 77th Conference of the Inter-Parliamentary Union, Managua, 27 April-2 May 1987 ; note by the UNCTAD Secretariat.