of the network but by applying the tariff which corresponds to the point of interconnection requires. Article 44 : The powerful operators and service providers interconnection and comply with the principle of orientation towards Reporting costs are the costs of the components of the network or management structures of the operator intervening effectively in the service of interconnection. The relevant costs include: - the general costs which are relating to the elements of the networks used at the same time by the operator for the services of his own customers and for the services of interconnection; - costs specific to the services of interconnection which are directly induced by only these services. The non-relevant costs include the costs other than interconnection. The accounting systems of the costs must be complete, clear and detailed, in order to ensure the transparency of the calculation of the tariffs of interconnection. The Telecommunications / ICT Regulatory Agency may require a powerful operator or service provider to necessary justify its tariffs of interconnection and, if necessary, require its adaptation. The models of determination of interconnection are set by the National Regulatory Authority. The powerful operators are compelled to link to the project of interconnected to the Regulatory Agency, a detailed presentation justifying the major tariffs suggested. The Regulatory Agency of information and information on the required information, and updates periodically the aforementioned list. The Regulatory Authority must make sure of the validity of the costing methods used validity of the data used. Article 45 : The powerful operators and suppliers must hold, for the purpose of regulation, a separated cost accounting per activity. They must isolate on the accounting level certain activities Page 19 services and activities which permit to check the compliance with the obligations.