Related Clues:

• It's right to get etc. with it in such impolite surroundings
• Strict propriety
• See 26
• City bird's inoffensive moral stance?
• Sound leader's rule
• A royal holding first place in Law
• Fundamental truth — moral rule
• Fundamental truth college head proclaimed
• Correctness
• Law of nature, rule of conduct
• Set of rules potentate's displayed around current place
• General guiding rule
• In which, theoretically, capital is spoken of
• Tenet of cardinal, reportedly
• Personal rule of conduct school head put into speech