S.D. Codified Laws § 36-21A-130
Any agency agreement in which a broker represents a seller or lessor shall be in writing and shall contain the proper legal description, the price and terms, the date of authorization, the expiration date, the type of agency relationship established, compensation to be paid, authorization to cooperate with or compensate other brokers, and the signatures of all parties. The licensee who obtains the agreement shall give the person signing a copy of the agreement.
Any agency agreement in which a broker represents a buyer or tenant shall be in writing and shall contain a description of the type and geographical area of property sought by the client, the type of agency relationship established, the compensation to be paid, the date of authorization, the date of expiration, and the signatures of all parties. The licensee who obtains the agreement shall give the person signing a copy of the agreement.
An agency agreement between a broker and a buyer, seller, or lessee may not include a provision for automatic renewal of the agreement at expiration. A property management agreement may include a provision for automatic renewal at expiration if it contains a provision for written cancellation on terms agreeable to all parties to the agreement.
When entering into an agency agreement, a broker shall provide a clear and complete explanation of the broker's representation of the interests of the seller/landlord or buyer/tenant. If the broker represents more than one party in a transaction, the agreement shall state how the representation may be altered. The agreement shall require authorization of all parties to the transaction before the broker initiates any transaction in which the broker would represent all parties.
An agency agreement shall be signed by the responsible broker. However, the responsible broker may authorize a salesperson or broker associate to sign agreements on behalf of the responsible broker.
The commission may promulgate rules pursuant to chapter 1-26 to provide for uniform provisions in any agency agreement under this section.
SDCL 36-21A-130