Ill. Admin. Code tit. 95, § 400.665
b) General Admissibility of Relevant Evidence
c) Exclusion of Relevant Evidence on Grounds of Prejudice, Confusion or Waste of Time
Although relevant, evidence may be excluded if its probative value is substantially outweighed by the danger of unfair prejudice, confusion of the issues, or misleading the members, or by considerations of undue delay, waste of time, or needless presentation of cumulative evidence. (Il. Mil. R. Evid. 403)