covered contract in which the supplier participated or participated. The rules of procedure for all challenges are set in writing and made accessible to all. In order to ensure open, fair and transparent conditions of competition in public procurement, a number of WTO members negotiated the Public Procurement Agreement (GPA). The signatories of the GPA agreed that companies from other signatory countries will not be treated less favourably in terms of public procurement than domestic firms, in accordance with the principles of national treatment and non-discrimination. Locally created businesses are no less well treated because they are of foreign origin or because the goods and services they offer are of foreign origin. 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.  Of these three areas, GPA work is the most active and has led to significant trade liberalization. On 6 April 2014, the revised GPA came into force and marks an important step in the WTO. To be covered by the GPA, public procurement must meet minimum value thresholds. These vary depending on the type of purchasing unit and the contract.
You will find the current thresholds in the WTO`s table of thresholds (link offsite). The revised GPA expands market access opportunities under the agreement, bringing many governments (departments and agencies) into the scope of the GPA and incorporating new services and other public procurement areas into its expanded coverage. Parties to the revised agreement will have market access estimated at between $80 billion and $100 billion per year, bringing the total coverage of the agreement to $1.7 trillion per year.