If any clause, sentence, paragraph, provision, part, or section of this chapter, or the application thereof, for any reason, is adjudged by a court of competent jurisdiction to be invalid, that judgment shall not affect, impair, or invalidate the remainder of this chapter and the application thereof, but shall be confined in its operation to the clause, sentence, paragraph, or part thereof directly involved in the controversy in which the judgment shall have been rendered and to the circumstances involved.