144 No. 15 of 2009] Information and Communication Technologies (b) ensure that the reference interconnection offer, and its terms and conditions, and the subsequent provision of interconnection is fair and non discriminatory andthe interconnection fees are cost oriented and transparent; the interconnection points are made accessible on a transparent basis at any technically feasible point in the network; and (iii) the terms and conditions determined by the Authority at the time of the offer are incorporated within the reference interconnection offer; provide interconnection and ancillary information to other licensees under the same conditions, and of the same quality, as the licensee provides for the licensee's own services or those of its subsidiaries, affiliates or agreements; and maintain the licensee's accounts in a manner that enables the Authority to verify the licensee's compliance with paragraph (b). A licensee shall maintain a separate account for interconnection and any other business activities sufficiently detailed to allow the Authority to identify all elements of revenue and costs, together with the basis of their calculation. An interconnection agreement resulting from the signature of a reference interconnection offer, shall be in writing, in English and shall not pose an unnecessary risk— (a) in the event of catastrophic networkbreakdown or in exceptional cases of force majeure such as extreme weather, earthquakes, flood, lightning or fire, to the maintenance ofan electronic communications network used for the provision of electronic communications services to the public; or an electronic communications service provided to the public;