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.