373.21 PARENT’S RESPONSIBILITY.
   (a)   No parent of any child or guardian of any ward shall authorize or knowingly permit any such child or ward to violate any of the provisions of this chapter.
   (b)   Whoever violates any provision of this section is guilty of a minor misdemeanor on a first offense; on a second offense within one year after the first offense, the person is guilty of a misdemeanor of the fourth degree; on each subsequent offense within one year after the first offense, the person is guilty of a misdemeanor of the third degree.