(1)"Cipher telegram" means a telegram the text of which is composed of-(a)International form of Indian numerals or groups or series of such numerals with a secret meaning or of letters (excluding the accented letters or groups of series of letters) with a secret meaning, or(b)words, names, expressions of combination of letters not fulfilling the conditions of plain language (rule 21) or code (rule 24).(2)The combination of figures and letters, figures or letters and signs in one group with a secret meaning, shall not be permitted. Letter cipher shall be arranged in groups of five letters.(3)The groups referred to in rule 25 shall not be considered as letter cipher, i.e., as letters having a secret meaning.Note. - The characters and Devanagri characters in half or in full with a dot or dash (halant) under them shall not be admissible for use in Devanagri code or cipher telegrams (rules 23 to 27).
