The incumbent operator(Türk Telekom) and three mobile operators (Turkcell,Vodafone, Türk Telekom) have been designated to set their access tariffs on cost basis. In case the Authority notices that the obliged operators have not set their tariffs as cost-oriented, the Authority shall be entitled to set their access tariffs as cost-oriented. The  interconnection conditions are being regulated with Reference Interconnection Offers for SMP operators who are subject to publish RIOs. Other operators can freely negotiate interconnection prices and conditions.