Section 110.87 - Conditions in a notice or order(a) A notice or order granting a hearing or permitting intervention may restrict irrelevant or duplicative testimony, or require common interests to be represented by a single spokesman.(b) If a participant's interests do not extend to all the issues in the hearing, the notice or order may limit his participation accordingly.(c) Unless authorized by the Commission, the granting of participation will not broaden the hearing issues.