Possible Clues:

• Code of practice in business ( 6)
• Country dwellers, loosely speaking, follow alien rules of conduct
• Subject of a Congressional committee
• Subject for Aristotle
• Standards to be observed as in business
• Code of behaviour of unnamed minority group
• Principles to be observed by business and professions
• Code of Violet Elizabeth's county?
• Code of practice for professional people
•     Congressional committee subject