Article 67 1.      Subject to the requirements of any statement published by the General Secretariat, service providers shall ensure at the time of allocation or assignment that customers understand that they have no ownership, special or property rights in numbers and that numbers may be reallocated or re-assigned, including where the customer has paid a special fee or charge for the assignment or use of a particular number. 2.      Service providers shall also ensure that customers may resort to adequate remedies in the event that such numbers are re-allocated or reassigned, including appropriate refunds of any special fees or charges or other forms of fair compensation.     Article 68 1.      The General Secretariat may, after consultation with service providers and other interested parties, issue an order to one or more service providers to develop or to assist in the development of a number portability implementation plan for approval and implementation by the General Secretariat. Such order shall form part of the Plan. Any order issued by the General Secretariat in this regard shall contain:   a.      The schedule for implementation of number portability. b.     Markets and service providers covered by the Plan. c.      The technical means of providing number portability. d.     The recovery of costs for implementation of the Plan.   2.      The number portability implementation plan shall identify specific responsibilities for the supply, development and operation of the facilities and systems needed to implement number portability. Following development and approval of a number portability implementation plan, the General Secretariat may issue any other regulations, rules, orders or notices required for its implementation.   Article 69 The General Secretariat may, after consultation with service providers and other interested parties, issue an order directing one or more service providers to develop or to assist in the development of a service provider selection or pre-selection implementation plan for approval and implementation by the General Secretariat. Following development and approval of a service provider selection or pre-selection implementation plan, the General Secretariat may issue any other regulations, rules, orders or notices required for its implementation.