Final answer:
The Code of Ethics for REALTORS® prohibits members from making negative remarks about other real estate professionals, ensuring professional courtesy and fair competition.
Step-by-step explanation:
The Code of Ethics for REALTORS® prohibits its members from knowingly or recklessly making negative remarks about other real estate professionals. Established by the National Association of Realtors (NAR), the Code of Ethics is a set of rules that governs the professional conduct of its members. This provision specifically aims to encourage professional courtesy and to prevent unfair competition among real estate agents and brokers.