The board may make any appropriate investigation to carry out the purposes of the Custodians’ Civil Service Law. In connection therewith, any member of the board may administer oaths, issue subpoenas to witnesses and compel their attendance at assessments, and examine books, papers and records and compel their production by witnesses in the same manner as if the subpoenas had been issued from a court of record in this state. [Amended by 2023 c.437 § 7]