The following shall be placed in the police retirement fund and transmitted promptly to the board of trustees:
(1) all money withheld from salaries of police officers for the violation of rules of the police department;
(2) all bequests, gifts, or emoluments paid or given on account of any extraordinary service of a member of the police department, except when specifically allowed to be retained by the officer by the mayor, commissioners, and chief of police; and
(3) all money derived from the provisions of this chapter.