126 Telecommunications Act 2005 2005, No.20 this Act, if the licence provides that the tariffs are not subject to regulatory approval. (3) Tariffs for telecommunications service provided by the dominant service providers shall be based on the cost of efficient service provision and shall not contain excessive charges which are made solely as a result of the service provider‟s dominant position. (4) The Regulator may issue an order to require a change in the tariffs for telecommunications services provided by a dominant service provider where such tariffs are in contravention of subsection (3). Such an order shall nominate the new tariff amount and give reasons for the required change. (5) Tariffs that are subjects to filing with and approval by the Regulator under this section shall enter into force only after they have been approved by an order of the Regulator. Any agreement or arrangement between service providers and any customer to apply such a tariff, other than one approved by the Regulator, is prohibited and, despite any other law, shall be regarded for all purposes as null and void. (6) Unless the Regulator makes an order to the contrary, a dominant service provider shall not be required to file or obtain approval of tariffs for services that are provided in markets where the service provider is not designated to be a dominant service provider. (7) A service provider shall not charge for a accept tariffs, rates, charges, other consideration or impose terms or conditions that are contrary to the provisions of an applicable tariff approved by the Regulator. 41. Publication of Tariffs-(1) Unless the Regulator orders otherwise, when a dominant service provider files a tariff or schedule of tariffs with the Regulator, the service provider shall: (a) from the date on which the tariff or schedule of tariffs is filed until the tariff is approved: (i) publish an electronic copy on the service provider‟s web site; and (ii) maintain a paper copy available to the public at the service provider‟s main business offices; and