Article (46) Use of Radio-communications Stations for Navigation Purposes No vessel that arrives at the ports or coasts of the Kingdom or aircraft that lands in the airports of the Kingdom shall use its own Radiocommunications Stations for any purpose other than the purposes of sea or air navigation, rescue and emergency operations without obtaining a Frequency License. No foreign vehicle shall use the Radio communications Stations located in the Kingdom except after obtaining a License therefore. The Radio communications Authority shall, in coordination with the Authority, take the necessary measures to report to the government of the relevant country of any acts that take place on board any aircraft, vessel or foreign vehicle which constitute a violation of the provisions of this Law. Article (47) Migration of Frequencies a) Within three months of the effective date of this Law, any user of the following frequencies shall cease to use such frequencies and inform the Authority in writing that such frequencies are available for Assignment by the Authority in accordance with Article (44) of this Law: 1) A contiguous set of GSM channels equal to 50% of the total available channels in the 900 MHz band, as directed by the Authority. 2) A contiguous set of GSM channels equal to 66.67% of the total available channels in the 1800 MHz band, as directed by the Authority. b) A User of frequencies who has complied with the provision of paragraph (a) of this Article shall have the right to such pro rata rebate of the annual fee that it has paid as is proportionate to the period of use remaining. Article (48) Compliance with International Treaties and Other Legislation