absence of such specifications, the out-of-band issues specified in the most recent recommendations of the ITU. Any establishment of Radio equipment and any installation or setting up with a regulation relating to the protection of the public against the effects of electromagnetic Page 21 disasters, infrastructure and radio equipment can be required with the laws into force. Article 53 : The sector-based management of radio frequencies is ensured by the recipients. The Telecommunications / ICT Regulatory Authority is the recipient of the spectrum of the frequencies that are intended for the actors of the Telecommunications / ICT sector. The Telecommunications / ICT Regulatory Agency ensures the distribution of the administrative management of the spectrum of which it is the recipient. The Telecommunications / ICT Regulatory Agency assigns to the actors of the sector, the frequency bands corresponding to their needs. It communicates to the Ivorian Radio Frequency Management Agency, for the update of the national plan of frequencies. The assignments of the radio frequencies must be carried out under objective, transparent and non discriminatory conditions The Telecommunications / ICT Regulatory Agency must make sure that all users, whatever category considered, optimize the use of the frequency bands which they are assigned. In the event of re-assignment of frequencies by the Telecommunications / ICT Regulatory Agency reallocation by the Ivorian Radio Frequency Management Agency, the Regulatory Agency informs the previously assigned. The use of a radio frequency band is a subordinate to the prior assignment of this frequency band by the Telecommunications / ICT Regulatory Agency. The termination of the operation of radio equipments or one of their elements must immediately, notified to the Telecommunications / ICT Regulatory Agency.