The GPA is a plurilateral agreement within the framework of the WTO, meaning that not all WTO members are parties to the Agreement. At present, the Agreement has 15 parties comprising 43 WTO members. Another 28 WTO members participate in the GPA Committee as observers. Out of these, 10 members are in the process of acceding to the Agreement. The Agreement on Government Procurement (GPA) requires that open, fair and transparent conditions of competition be ensured in government procurement. http://www.wto.org/english/docs_e/legal_e/gpr-94_01_e.htm