REALTORS® shall cooperate with other brokers except when cooperation is not in the clientʼs best interest. The obligation to cooperate does not include the obligation to share commissions, fees, or to otherwise compensate another broker
Standard of Practice 3-10:
The duty to cooperate established in Article 3 relates to the obligation to share information on listed property, and to make property available to other brokers for showing to prospective purchasers/tenants when it is in the best interests of sellers/landlords.
See the full Code of Ethics HERE