The GSTP was established in 1989 as a framework for preferential tariff reductions and other measures of cooperation, including "para-tariffs, non-tariff measures, direct trade measures including medium and long-term contracts and sectoral agreements", to stimulate trade between developing countries. Today, only preferential tariffs are covered by the Agreement. Today, the GSTP membership extends to 42 developing countries, including Mercosur. The GSTP membership also includes 7 least developed countries (LDCs).