An accurate record, which may be taken by tape recording or other appropriate means, may be kept of the proceedings of any hearing. Upon his written request to the chairman and at least one other member of the Commission, a witness shall be furnished at a reasonable charge with a transcript of the record insofar as it pertains to him or his testimony, if such record was taken at a public hearing, or, if taken at a private hearing, such record is subsequently used or referred to in a public hearing or becomes relevant in any proceeding to which the witness is a party. The record need not be transcribed or printed, except as herein provided, unless the Commission shall so determine.
25 ILCS 85/4