Final answer:
A listing agreement indeed requires the written consent of all parties for any changes, as it is a binding legal document between a property owner and a real estate broker or agent.
Step-by-step explanation:
The statement that a listing agreement can only be changed with the written consent of all parties is true. A listing agreement is a contract between a property owner and a real estate broker or agent which authorizes the broker to represent the seller and their property. Any amendment or change to this legal document typically requires the approval of all parties involved in the agreement. This is to ensure that all parties are clearly aware of and agree to the modifications made to the contractual terms.