S.D. Codified Laws § 1-16H-42
The sections, clauses, sentences, and parts of this chapter are severable, are not matters of mutual essential inducement, and any of them may be excised by any court of competent jurisdiction if this chapter would otherwise be unconstitutional or ineffective. It is the intention of this chapter to confer upon the authority the whole or any part of the powers in this chapter provided for, and if any one or more sections, clauses, sentences, and parts of this chapter are for any reason questioned in any court of competent jurisdiction and are adjudged unconstitutional or invalid, the judgment does not affect, impair, or invalidate the remaining provisions thereof, but is confined in its operation to the specific provision or provisions so held unconstitutional or invalid, and the inapplicability or invalidity of any section, clause, sentence, or part of this chapter in any one or more instances does not affect or prejudice its applicability or validity in any other instance.
SDCL 1-16H-42