SDCL § 15-40-1: Scope--Protected public expression.

Except as otherwise provided in § 15-40-2, the provisions of this chapter apply to a cause of action against a person based on the person's protected public expression. For purposes of this chapter, "protected public expression" includes:

(1) Communication in a legislative, executive, judicial, administrative, or other governmental proceeding;

(2) Communication on an issue under consideration or review in a legislative, executive, judicial, administrative, or other governmental proceeding; or

(3) Exercise of the person's right of freedom of speech or of the press, the right to assemble or petition, or the right of association, as guaranteed by the United States Constitution or South Dakota Constitution, on a matter of public concern.