Section 19-168. Fishing from public bridges

(a) The commissioner shall be
  authorized  to  post  on  any  public  bridge  within  the  city,  signs
  prohibiting  fishing therefrom. The commissioner shall post and maintain
  such signs on bridges selected at his or her discretion.
    (b) It shall be  unlawful  for  any  person  to  fish,  by  any  means
  whatsoever,  from  any  public  bridge  within  the  city  where  a sign
  prohibiting such conduct has been posted.
    (c) Violation of this section shall be punishable by  a  fine  of  not
  more than fifty dollars nor less than fifteen dollars for each violation
  thereof.