S.D. Codified Laws § 41-17-22.4
In any concessionaire lease of property located in Custer State Park, the Game, Fish and Parks Commission shall require in the lease that if the concessionaire wants to sell, transfer, convey, or assign the concessionaire's interest in the leasehold, the commission shall publish and provide for a prospectus advertising the leasehold and intent to transfer. The commission shall then select from any interested persons a successor concessionaire that the commission deems most qualified.
If the concessionaire and successor agree upon terms and conditions of the transfer, which shall be agreed to in writing within a time period to be set by the commission, but no longer than six months, the commission may approve and consent to the assignment.
If there is no agreement in writing within the specified period of time, the commission, if the concessionaire still wants to sell, transfer, convey, or assign its interest in the leasehold, shall provide for another prospectus as provided in this section and follow the same procedures set forth in this section until a successor concessionaire and present concessionaire agree upon terms and conditions of a transfer but for no longer period of time than the duration of the leasehold.
SDCL 41-17-22.4