(a) In contested cases irrelevant, immaterial, or unduly repetitious evidence shall be excluded. The rules of evidence as applied in civil cases in the circuit courts of this state shall be followed. When necessary to ascertain facts not reasonably susceptible of proof under those rules, evidence not admissible thereunder may be admitted, except where precluded by statute, if it is of a type commonly relied upon by reasonably prudent men in the conduct of their affairs. Agencies shall be bound by the rules of privilege recognized by law. Objections to evidentiary offers shall be noted in the record. Any party to any such hearing may vouch the record as to any excluded testimony or other evidence.

(b) All evidence, including papers, records, agency staff memoranda and documents in the possession of the agency, of which it desires to avail itself, shall be offered and made a part of the record in the case, and no other factual information or evidence shall be considered in the determination of the case. Documentary evidence may be received in the form of copies or excerpts or by incorporation by reference.

(c) Every party shall have the right of cross-examination of witnesses who testify, and shall have the right to submit rebuttal evidence.

(d) Agencies may take notice of judicially cognizable facts. All parties shall be notified either before or during hearing, or by reference in preliminary reports or otherwise, of the material so noticed, and they shall be afforded an opportunity to contest the facts so noticed.

(e) Upon motion in writing served by any party as notice may be served pursuant to section two, article seven of this chapter and therein assigning error or omission in any part of any transcript of the proceedings had and testimony taken at any such hearing, the agency shall settle all differences arising as to whether such transcript truly discloses what occurred at the hearing and shall direct that the transcript be corrected and revised in the respects designated by the agency, so as to make it conform to the whole truth.