SDCL § 49-34A-21: Determination of rates--Order--Maximum rate--Classification adjustment.

If, after the hearing, the Public Utilities Commission fails to find the rates to be just and reasonable or if the commission finds the rate to be discriminatory, the commission shall determine the level of rates to be charged or applied by the utility for the service in question and shall fix the same by order to be served upon the utility; and the rates are thereafter to be observed until changed, as provided by this chapter. In no event shall the rates exceed the level of rates requested by the public utility. Rate classifications may be adjusted upward or downward by the commission; provided the anticipated receipts will not exceed the amount of return requested.