The Tenant Agency Contract (Form TAC) is the exclusive agency contract for tenants' agents. This is a legally binding contract, if not fully understood seek competent legal advice before signing.An agency agreement is a legally binding contract and it is important that you read and understand it. An exclusive listing agreement may comprise one of the following: (1) The exclusive agency of the broker. Explore what an exclusive agency agreement is, its legally binding nature, and when to use one. Discover the risks, and stay on top with our free template. We signed a buyers agent agreement for the last home. We thought it was for that specific property but it isn't and it has no expiration date. These 3 types of exclusive agency are defined in the Definitions. D Exclusive agency agreement of the attached Agreement.