In case any section, clause, sentence, paragraph or part of this act shall for any reason be adjudged by any court of competent or final jurisdiction to be invalid, such judgment shall not affect, impair or invalidate the remainder of this act, but shall be confined in its operation to the section, clause, sentence, paragraph or part thereof directly involved in the controversy in which said judgment shall have been rendered.
Laws 1939, p. 13, § 14.