S.D. Codified Laws § 12-27-15

Any printed material or communication made, purchased, paid for, or authorized by a candidate or political committee that disseminates information concerning a candidate, public office holder, ballot question, or political party shall prominently display or clearly speak the statement: "Paid for by (name of candidate or political committee)." This section does not apply to buttons, balloons, pins, pens, matchbooks, clothing, or similar small items upon which the inclusion of the statement would be impracticable. A violation of this section is a Class 2 misdemeanor. A subsequent offense within a calendar year is a Class 1 misdemeanor.