53 Pa. Stat. § 23436
The civil service commission in each city of the second class shall:--
First.--Prescribe, amend and enforce rules and regulations for carrying into effect the provisions of this act. All rules so prepared may, from time to time, be added to, amended or rescinded: Provided, That all rules shall be approved by the mayor before they go into effect, but when so approved shall not be annulled or changed except by the commission with the approval of the mayor: And provided further, however, That if the mayor takes no action on a rule or amendment, submitted to him, within a period of ten days from the date of its submission, then the rule or amendment shall become effective as though approved by the mayor.
Second.--Keep minutes of its own proceedings, and records of its examinations and other official action. All recommendations of applicants for office, received by the said commission or by any officer having authority to make appointments to office, shall be kept and preserved for a period of three years, and all such records--recommendations of former employés excepted--and all written causes of removal, filed with it, shall, subject to reasonable regulation, be open to public inspection.
Third.--Make investigations, either sitting as a body or through a single commissioner, concerning all matters touching the enforcement and effect of the provisions of this act, and the rules and regulations prescribed thereunder, concerning the action of any examiner or subordinate of the commission, or of any person in the public service in respect to the execution of this act; and, in the course of such investigations, each commissioner and the chief examiner shall have power to administer oaths and affirmations, and to take testimony.
53 P.S. § 23436