The following non-governmental organizations were represented under Article 13 of the Commission's Terms of Reference: American Association of Petroleum Geologists (AAPG); European Federation of Geologists (EFG); Combined Reserves International Reporting Standards Committee (CRIRSCO), International Gas Union (IGU), International Valuation Standards Committee (IVSC), Society of Petroleum Engineers (SPE) and World Energy Council (WEC).
Les organisations non gouvernementales ci-après étaient représentées en vertu de l'article 13 du mandat de la Commission: American Association of Petroleum Geologists (AAPG), Fédération européenne des géologues (FEG), Combined Reserves International Reporting Standards Committee (CRIRSCO), Union international de l'industrie du gaz (UIIG), Comité international des normes d'estimation (IVSC), Society of Petroleum Engineers (SPE) et Conseil mondial de l'énergie (CME).  OUVERTURE DE LA RÉUNION