Article 60 The General Secretariat may develop methods of price control and may consult service providers or any other interested parties. The General Secretariat may issue orders or notices prescribing guidelines for the development of proposals for methods of price control, or setting out directions for the further development of any proposal that has been filed with the General Secretariat, or any method of price control that is under development by the General Secretariat. The General Secretariat may also approve a proposal or method of price control for implementation by one or more service providers. Following development and approval of any method of price control, the General Secretariat may also issue regulations, rules, orders or notices required for its implementation.   Chapter six Numbers and Numbering Article 61 The General Secretariat shall prepare, publish and manage a National Numbering Plan (hereinafter “the Plan”) and shall allocate and assign numbers and number ranges in accordance with the Plan. The General Secretariat shall, in preparing the Plan, take into account the following:   1.         The Plan shall be consistent with the requirements of international agreements, commitments, conventions, regulations and recommendations to which the State of Qatar is a party. 2.      Expected growth in demand for telecommunications services and assignment of numbers without delay. 3.      The Plan and resulting allocation and assignment of numbers shall reflect the needs of service providers and customers, and be consistent with the efficient use of the service providers’ telecommunications networks. 4.          The Plan may provide for many features such as number portability and service provider selection when required. 5.          Allocation or assignment of numbers shall not confer an unreasonable advantage or disadvantage on any service provider.     Article 62 In preparing and managing the Plan, the General Secretariat shall have due regard for existing allocations and assignments of numbers and for the costs to service providers in accommodating the Plan.