§ 73.02  RIDING ON BICYCLES.
   (A)   A person propelling a bicycle shall not ride other than upon or astride a permanent and regular seat attached thereto.
   (B)   No bicycle shall be used to carry more persons at one time than the number for which it is designed and equipped; except that, an adult rider may carry a child securely attached to his or her person in a backpack or sling.
(ILCS Ch. 625, Act 5, § 11-1503)  (1999 Code, § 73.02)  Penalty, see § 70.999