Final answer:
A code of conduct should contain clear and concise principles to enhance its effectiveness.
Step-by-step explanation:
The element that a code of conduct should contain to enhance its effectiveness is clear and concise principles. Lengthy and complex language, ambiguous guidelines, and excessive restrictions can all hinder the effectiveness of a code of conduct. Clear and concise principles provide employees with a clear understanding of expected behavior and help guide decision-making in ethical dilemmas.