10.12 Investigations.

   The Council, the City Manager, the Civil Service Commission, or any person designated by any of them, may make investigations concerning the facts in respect of the operation and enforcement of the civil service provisions of this Charter and of the rules established thereunder, and concerning the condition of the civil service of the City or any branch thereof. Any person, or persons, making an investigation authorized or required by this section shall have power to subpoena and to require the attendance of witnesses, to require the production of books and papers pertinent to the investigation, and to administer oaths to such witnesses.