AUTHORITY: Implementing and authorized by Section 5-10(a)(i) and Article 10 of the Illinois Administrative Procedure Act [5 ILCS 100].TREASURER
a) Any Party or witness may be called as an adverse witness. Examination of the adverse witness shall be allowed as if under cross-examination.
b) A witness called in good faith whose testimony surprises the party who called the witness may be examined by that calling Party as if under cross-examination, and the testimony of the witness may be impeached by prior statements.