It shall be the general responsibility of the Commission:
(a) To represent the public interest in the improvement of personnel administration in the City government;
(b) To sit as a body in investigating and hearing grievances of employees and appointing authorities;
(c) To make reports to the Council on the quality and status of personnel administration in the City government and to make recommendations for, or effect under its own powers, improvement therein;
(d) To investigate enforcement of provisions of this article, for which purpose it shall have the power to summon witnesses, administer oaths and compel the attendance of witnesses and the production of books, papers and other evidence. Failure on the part of any officer to obey such summons or to produce books, papers and other evidence as ordered under the provisions of this section shall constitute misconduct in office. Failure on the part of any employee or other person to obey such summons or to produce books, papers or other evidence as ordered under the provisions of this section shall constitute a violation of the City Charter and such employee, when found guilty of such violation by a competent tribunal, may be punished by a fine of not to exceed one hundred dollars ($100.00) or imprisonment not to exceed ninety days, or both, in the discretion of the court.
(e) It is further provided that, in case of failure on the part of any person to obey such summons or to produce such books, papers and other evidence as so ordered, the Commission may invoke the aid of the Circuit Court of Wayne County in requiring obeyance of such summons or production of such books, papers and other evidence. The Circuit Court of Wayne County, in case of contumacy or refusal to obey such summons or to produce such books, papers and other evidence, may issue an order requiring such person to obey such summons or to produce such books, papers and other evidence and to give evidence touching the matter in question, and any failure to obey such order of the Court may be punished by such Court as contempt thereof.
(f) To contract for such technical personnel services as it may deem necessary with an agency or person of recognized professional standing in the field of personnel administration; the power to adopt, revise or amend such rules and regulations as it may deem necessary for the administration of the provisions of this article subject to the approval of the Council.