Conference of the Parties. The supreme decision-making body of the Convention, representing all countries that are Parties to the Convention. Currently meets once a year to review the progress of implementating the Convention, and any other legal instruments adopted by the COP (e.g. the Kyoto Protocal). It takes the decisions necessary to promote effective implementation of the Convention, including institutional and administrative arrangements. A key task for the COP is to review the national communications and emission inventories submitted by the Parties. Based upon this, the COP assesses the effects of measures taken by Parties and the progress made to achieve the ultimate objective of the Convention to stabilize greenhouse gas concentrations in the atmosphere. The first meeting was held in Berlin in 1995, and the location of the conference tends to shift as the Presidency rotatetes among the five recognized UN regions (Africa, Asia, Latin America and the Caribbean, Central and Eastern Europe and Western Europe and Others).