(a) An accurate transcript shall be made of the testimony of all witnesses at all proceedings of the Commission. Transcripts shall be recorded solely by the official reporter or by any other person or means designated by the Commission.

(b) Every person who submits data or evidence shall be entitled to retain or, on payment of lawfully prescribed costs, procure a copy or transcript thereof, except that witnesses in a hearing held in executive session may be limited, for good cause, to inspection of the official transcript of their testimony. Transcript copies of public sessions may be obtained by the public upon the payment of the cost thereof.

(c) Persons who have presented testimony at a proceeding may ask within 60 days after the close of the proceeding to correct errors in the transcript of their testimony. Such requests shall be granted only to make the transcript conform to their testimony as presented at the proceeding.