S.D. Codified Laws § 49-43-7
At the time of licensing, a grain warehouse operator shall file with the commission the rates charged by the grain warehouse for storing, receiving, and redelivering grain. A grain warehouse operator may file different rates for different commodities and the rates shall be effective for the licensing period beginning on July first. A grain warehouse operator may adjust rates during the licensing period no more than four times and adjusted rates shall be effective on the date of filing. A grain warehouse shall charge each customer the rates on file with the commission without discrimination. However, a warehouse operator may waive the fees for receiving and handling if the operator takes title to the grain. A list of the rates shall be made available to a customer upon request.
SDCL 49-43-7