Conference on oil. OPEC meetings are usually held in April, July and November every year. OPEC member states discuss oil prices, oil volumes and other economic policies. Participating countries will take actions to change oil prices and supply to achieve their economic goals. The OPEC Conference is the highest authority of OPEC. Each member state sends a delegation headed by the Minister of Petroleum, Minerals and Energy to the conference. The conference adheres to the principle of unity of all member states, and each member country has one vote. It is responsible for formulating the rules of the organization. major policies.