S.D. Codified Laws § 49-11-7
If a state law, Public Utilities Commission order, or county or municipal order, resolution, or ordinance fixing rates or charges for service to be rendered by a public utility or public service corporation, has been stayed, suspended, or enjoined, the common carrier, public utility, or public service corporation upon whose application the operation and enforcement was stayed, suspended or enjoined, shall file, during the pendency of such litigation and until its final determination, with the Public Utilities Commission, monthly reports showing any rate or charge exacted in violation of the provisions of such law, order, resolution, or ordinance, the total amount of money received, from whom and what for, the rate which should have been exacted under the terms of such law, order, resolution, or ordinance, the total amount of money which should have been received thereunder, and the amount of the refund to be made if the rates or charges fixed in such law, order, resolution, or ordinance are determined to be legal and valid.
The violation of this section or a Public Utilities Commission order issued pursuant to this section by a common carrier, public service corporation, or other public utility subject to this title or by an officer, agent, or employee of such companies is a Class 2 misdemeanor.
SDCL 49-11-7