S.D. Codified Laws § 32-5-8.2
Trailers or semitrailers with identification plates may only be pulled by certain motor vehicles--Violation as misdemeanor
A trailer or semitrailer licensed with an identification plate pursuant to § 32-5-8.1 may only be pulled by a noncommercial motor vehicle licensed pursuant to § 32-5-6.3 or a commercially licensed motor vehicle except as provided by § 32-5-8.3 . Any violation of this section is a Class 2 misdemeanor.
Source: SL 1991, ch 239, § 7.