§ 71.38 PERSONS RIDING MUST STAY INSIDE.
   No person when riding shall allow any part of his or her body to protrude beyond the limits of the vehicle in which he or she is riding, except to give any signals as are by law required, and no person shall hang on to any vehicle whatsoever.
(1940 Code, Ch. G, Art. VII, § 4) Penalty, see § 71.99