b'Mauritania Block C8 and Senegal Saint Louis Offshore Profond blocks, initially agreed that interests inthe Greater Tortue Ahmeyim Unit will be shared equally, with each block deemed to contribute 50% ofthe area of such unit. The respective interests in the Greater Tortue Ahmeyim Unit were thereforeinitially determined by the respective interests in such contributed block interests. Pursuant to the termsof the GTA UUOA, the percentage of such contributed interests is subject to a process ofredetermination once sufficient development work has been completed in the unit. We cannot assureyou that any redetermination pursuant to the terms of the GTA UUOA will not negatively affect ourinterests in the Greater Tortue Ahmeyim Unit or that such redetermination will be satisfactorilyresolved.We are not, and may not be in the future, the operator on all of our license areas and facilities and do not,and may not in the future, hold all of the working interests in certain of our license areas. Therefore, we havereduced control over the timing of exploration or development efforts, associated costs, and the rate ofproduction of any non-operated and to an extent, any non-wholly-owned, assets.As we carry out our exploration and development programs, we have arrangements with respect toexisting license areas and may have agreements with respect to future license areas that result in agreater proportion of our license areas being operated by others. Currently, we are not the operator ofthe Jubilee Unit, the TEN fields, Ceiba and Okume or certain producing fields in the U.S. Gulf ofMexico and do not hold operatorship in certain other offshore blocks. In addition, our agreements withBP and Chevron contemplate that operatorship will be transitioned fully to these companies in ourCote dIvoire (BP) and Suriname (Chevron) acreage upon a commercial discovery. As a result, we mayhave limited ability to exercise influence over the operations of the discoveries or prospects operated byour block or unit partners, or which are not wholly-owned by us, as the case may be. Dependence onblock or unit partners could prevent us from realizing our target returns for those discoveries orprospects. Further, because we do not have majority ownership in all of our properties, we may not beable to control the timing, or the scope, of exploration or development activities or the amount ofcapital expenditures and, therefore, may not be able to carry out one of our key business strategies ofminimizing the cycle time between discovery and initial production. The success and timing ofexploration and development activities will depend on a number of factors that will be largely outsideof our control, including:\x7f the timing and amount of capital expenditures;\x7f if the activity is operated by one of our block partners, the operators expertise and financialresources;\x7f approval of other block partners in drilling wells;\x7f the scheduling, pre-design, planning, design and approvals of activities and processes;\x7f selection of technology;\x7f the available capacity of processing facilities and related pipelines; and\x7f the rate of production of reserves, if any.This limited ability to exercise control over the operations on our license areas may cause amaterial adverse effect on our financial condition and results of operations.Our estimated proved reserves are based on many assumptions that may turn out to be inaccurate. Anysignificant inaccuracies in these reserve estimates or underlying assumptions will materially affect thequantities and present value of our reserves.The process of estimating oil and natural gas reserves is technically complex. It requiresinterpretations of available technical data and many assumptions, including those relating to current47'