SDCL § 49-31-12.1: Tariff as prima facie evidence of reasonableness--Commission certified as true copy.

Any tariff, or a certified copy, approved pursuant to § 49-31-1.4, 49-31-12, 49-31-12.2, 49-31-12.4, or 49-31-12.5, shall be received in evidence as an official tariff on file with the commission, without further proof. The commission shall certify that the tariff in question is a true copy of the original on file with the commission and that it is currently in effect. The tariff shall, in any suit brought against a company, constitute prima facie evidence that the rates or prices approved thereby are fair and reasonable.