37-2-3. Difference in selling prices as prima facie evidence of violation.Proof of the selling of gasoline, kerosene, or liquefied petroleum gases by any person, firm, company, association, or corporation at a lower rate in one section, community, or municipality of this state than such firm, person, company, association, or corporation charges for such commodity in another section, community, or municipality, after making due allowance for the difference, if any, in the grade or quality, and in the cost of transportation from the refinery shall constitute prima facie evidence of a violation of §37-2-1. Source: SDC 1939, §54.0902.
South Dakota Legal Code