37-2-45. Minimum octane rating grades of petroleum in all other counties.The minimum (R+M)/2 octane rating grades of petroleum products in all counties in the state other than those listed in §37-2-44 shall be no less than the following:(1)Regular unleaded 87;(2)Midgrade, plus, or super unleaded 89; and(3)Premium, supreme, high test unleaded 91. Source: SL 2013, ch 187, §7, eff. Mar. 6, 2013.
South Dakota Legal Code