We are still confused about the Development and Production Phase and the Additional Work Programme of the known accumulations. We were told that "The term of the Development and Production Phase for each Field shall extend for maximum twenty-five (25) years as from the date the discovery was made." But it is hard to define when would be the beginning of the Development and Production Phase for the known accumulations in blocks according the words. For the known accumulations, could we take the date of the contract signature as the beginning of the Development and Production Phase, or the date of the approval of the Development Plan, or the date of commercial production?