§ 19. Partial invalidity.

If any provision of this act, or the application thereof to any person
or circumstance, shall be adjudged by any court of competent
jurisdiction to be invalid or unenforceable, such judgment shall not
affect, impair or invalidate the remainder of this act or the
application of such provision to any other person or circumstance, but
shall be confined in its operation to the provision, person and
circumstance directly involved in the controversy in which such judgment
shall have been rendered.