The WTO Public Procurement Agreement is a “multilateral” agreement that means it applies to a number of WTO members, but not all members. The agreement came into force in 1979 as the Tokyo Round Code on Government Procurement, which came into force in 1981 under the General Agreement on Tariffs and Trade.  It was then renegotiated in parallel with the 1994 Uruguay Round and this version came into force on 1 January 1996. The agreement was then revised on March 30, 2012. The revised MPA came into effect on July 6, 2014.  The revised GPA, which came into force on 6 April 2014, is attracting increasing attention around the world, but the liberalisation of public procurement is not a completely new idea. Within the OECD, efforts have been made at an early stage to ensure that public procurement is subject to internationally accepted trade rules. The case was then included in the Tokyo trade negotiations under the GATT in 1976. The GPA is a multi-lateral agreement within the WTO framework, which means that not all WTO members are parties to the agreement. Currently, the agreement consists of 20 parties, with 48 WTO members. Thirty-six WTO members/observers participate in the GPA committee as observers.
Of these, 12 members are in the process of joining the agreement. GPA membership is limited to WTO members who have specifically signed or subsequently joined the GPA. WTO members are not required to join the GPA, but the United States urges all WTO members to participate in this important agreement. Several countries, including China, Jordan and Moldova, are negotiating GPA membership. The Public Procurement Agreement (GPA) is a multi-lateral agreement, under the auspices of the World Trade Organization (WTO), which governs the purchase of goods and services by the public authorities of the contracting parties, based on the principles of openness, transparency and non-discrimination. As a result, the first Tokyo Round Code on Government Procurement was signed in 1979 and came into force in 1981. It was amended in 1987 and the amendment came into force in 1988. The parties to the agreement then negotiated the extension of the scope and scope of the agreement, in parallel with the Uruguay Round.
Finally, on 15 April 1994, a new public procurement agreement (GPA 1994) was signed in Marrakech at the same time as the WTO agreement, which came into force on 1 January 1996. Preferential treatment of domestic goods, services and suppliers discriminates against foreign suppliers and therefore acts as a barrier to trade in this sector.