(2) A licensee shall not charge its customers using tariff rates that have not been filed with the Commission under paragraph (1). (3) A licensee shall ensure that all the tariff rates that have been filed with the Commission are available to the public for review and inspection and shall furnish its customers with the filed tariff rates, upon request. (4) A licensee who contravenes this regulation commits an offence. 6. Tariff approval for regulated services. (1) The Commission may from time to time publish in the Gazette a schedule of regulated services. (2) A licensee shall charge regulated services using tariffs that have been file and approved by the Commission. (3) All applications for approval of tariffs for regulated services shall be filed with the Commission and shall— (a) conform to the form, manner and methodology prescribed by the Commission; and (b) be accompanied by relevant documents, including all calculations, notes and any other information in support of the application. (4) Where the Commission does not approve the tariffs proposed by a licensee for a regulated service and recommends that the licensee to makes the adjustments specified to the proposed tariffs, the licensee shall adjust the proposed tariff accordingly. (5) The Commission may on its own motion, set or review tariffs or tariff structures for a regulated service. (6) A licensee shall not discontinue the provision of a regulated service without the prior written approval of the Commission. (7) Where the Commission determines that a service no longer meets the conditions that describe a regulated service, the Commission shall through a gazette notice notify the public that the service is no longer a regulated service.