SDCL § 32-19-3.2: Pneumatic tires with retractable studs permitted--Limitation--Violation as misdemeanor.

Notwithstanding the provisions of § 32-19-3, any motor vehicle with pneumatic tires that features an embedded block, stud, flange, cleat, spike, or other protuberance that is retractable may be used at any time of the year upon the highways of this state. However, no such block, stud, flange, cleat, spike, or other protuberance may be engaged or extended from May first to September thirtieth, inclusive. A violation of this section is a Class 2 misdemeanor.