Cap..173 Rev. 1985 Subsidiary Legislation 8-29 Telecommunications Frequencies 130. Ship radio installations when operating on the frequencies specified in the licence must conform with the International Regulations regarding frequency tolerances and must not cause interference on any other frequencies. Inspection and approval prior to issue of licence Posts 131. The installation must be inspected and approved by an officer of the and Telecommunications Department Unnecessary or anonymous before a licence can calls forbidden 132. The transmission of unnecessary or anonymous be issued. calls is forbidden. Ships to avoid interference 133. All ships must listen on the appropriate frequency before: commencing a call in order to ensure that interference is not caused to another vessel already i in communication with the Coast Station. Prohibition on use of radio in harbour 134.—(1) The use of radio apparatus other than a very high frequency radiotelephone while in port or harbour is prohibited except in cases of emergency or for urgent messages, when no other form of communication is available. Calls other than distress calls may be addréssed to the nearest Coast Station only: Provided that British and foreign warships may be permitted the use of radio apparatus while in port or harbour for communications, subject. to non-interference the purpose of normal’ radiowith existing telecommunications services and to any other restrictions that the Permanent Secretary may impose. (Amended: by Regulations 7th January 1964; Legal Notice 56 of 1981.) (2) Any person contravening ‘the provisions of this Regulations shall be guilty of an offence. ‘Log Book 135. A log book giving arecord of calls made and time should be kept by all licensed, vessels. (Amended by Legal Notice 56 oft 1981.) Inspection of apparatus 136. The radio installation, accessories, and all logs ‘and message files should be available for inspection at any reasonable time by.an officer. of the Department of Posts and Télecommunications. . Secrecy . 137.—(1) It is prohibited to receive radio ‘correspondence other ‘than that which the station is authorised to receive, but, in case such correspondence is received involuntarily, it must be néither reprodticed nor communicated to third persons, nor used for any purpose whatsoever, and the very existence thereof must