The Police Commission may adopt rules to carry out the purpose and duties of this Chapter. The Police Commission from time to time may make changes in these rules. These rules of the Commission shall apply only to the conduct of examinations for original appointments, for promotions, and to the conduct of hearings on charges brought against a member of the Police Department. All of these rules and changes therein shall be on file with the Village Administrator. The Village Attorney shall be the attorney representing the Police Commission.