Tennessee Code Title 43. Agriculture and Horticulture § 43-15-102

(a) The first person may appoint or designate the other person with whom the first person may contract as the first person's agent; and may invest the agent with authority to decide when and at what price or prices the farm products shall be sold and may appoint the agent the sole and exclusive agent to sell the products.

(b) Such farm products shall not be sold by the owner independent of the agent, or through or by any other agent, and they shall not be delivered for storage to any bailee or depository other than a designated bailee or depository of the agent.

(c) Such agency shall be irrevocable for the time for which it was by the parties entered into.