Where this chapter has been violated by juveniles under the age of eighteen years, in lieu of the fine and imprisonment as provided in general penalty for this code, and in lieu of filing charges in the juvenile court, the chief of police may prohibit the operation upon the streets, alleys and public places in the city for a period not to exceed thirty days, of a bicycle so used in such violation, in which event the bicycle so used in such violation shall be impounded by the chief of police and retained by him during the period of the operation which is prohibited. (Ord. 475 NCS §25; prior code §6.2.)