43. Radio Regulations shall mean an official publication of the International Telecommunication Union establishing radio communication management. 44. Radio station shall mean one or more transmitters or receivers or a combination of transmitters and receivers and auxiliary equipment necessary for carrying out activities of radio communication or radio astronomy services at a particular location. 45. Radio communication shall mean the conveyance, transmission and/or reception of information by means of radio waves. 46. Radio monitoring shall mean the control of radio wave environment parameters. 47. Radio disturbance shall mean electromagnetic disturbances occurring within the radio wave range. 48. Radio interference shall mean the degradation of the performance of equipment and/or device, radio communication or a radio system due to radio disturbances. 49. Registered user of electronic communications services shall mean the person who, not being a subscriber of public electronic communications services, is identified by an electronic communications service user identification code, and the information submitted at the moment of registration. 50. Communications cable duct system shall mean a part of electronic communications infrastructure consisting of communications cable ducts, pipes, wells and other facilities (manholes, lids, locks, communications cable supports, brackets, adjustment rings, etc.) intended to thread and/or unthread, merge, repair communications cables, and install other electronic communications equipment and protect it. 51. Conditional access shall mean technical measure and/or arrangement whereby access to the protected service is made conditional upon prior individual authorisation of the service provider. 52. Interface shall mean a network termination point and/or an air interface specifying the radio path between radio equipment and their technical specifications. 53. Security incident shall mean an event, action or omission which causes or may cause unauthorized access or allow illegal access to the information system or electronic communications network, disrupt or change, including management take over, the operation of information system or electronic communications network, destroy, damage, delete or change electronic data, deny or restrict access to the electronic data as well as enable unauthorized persons to appropriate or otherwise use of non-public electronic data. 8