§ 9. Attendance of witnesses; fees. 1. Witnesses shall be entitled to
the same fees as are allowed in civil cases in courts of record. Such
fees need not be pre-paid, and shall be paid; (a) in the case of persons
subpoenaed by the state civil service commission, from the state
treasury on the audit and warrant of the comptroller upon vouchers
approved by the president of the commission, or (b) in the case of
persons subpoenaed by a municipal commission, in the manner provided by
law for the payment of the lawful expenses of such municipal commission.

2. All public officers and their deputies and employees shall afford
the state civil service commission and any municipal civil service
commission all reasonable facilities in conducting the inquiries
authorized by this chapter, give inspection to such commission of all
books, papers and documents belonging or in any way appertaining to
their respective offices, produce said books and papers, and attend and
testify when required to do so by such commission.