Code of Ethics-Duties to Clients and Customers
Standard of Practice 3-2
REALTORS® shall, with respect to offers of compensation to another REALTOR®, timely communicate any change of compensation for cooperative services to the other REALTOR® prior to the time such REALTOR® produces an offer to purchase/lease the property. (Amended 1/94)
This means no changing the compensation amount without notifiying the other agent. For example: If the compensation listed in the MLS is 3% when I present an offer to the listing agent then it is 3%. They can’t change it to 2.5% since at the time I submitted the offer it was 3%.

