Related Clues:

• Morse's enigma
• Regulatory system on fish numbers
• Moral guidelines broken at GCHQ?
• Secret code
• The secret language of fish - English!
• Set of rules that's nonsense, fifth-rate
• Rules lines on carbon
• College poem put in cipher
• Fish sauce -- at last there's a set of rules
• Rules of behaviour one can understand if someone breaks
• Cryptograph
• Message in cipher
• Singer welcoming return of sanctimonious nonentity
• Some original characters from Colin Dexter, such as Morse
• Fake drug regulations