161—4.26 (17A) Intervention.
	 4.26(1) Motion. A motion for leave to intervene in a contested case proceeding shall state the grounds for the proposed intervention, the position and interest of the proposed intervenor, and the possible impact of intervention on the proceeding. A proposed answer or petition in intervention shall be attached to the motion. Any party may file a response within 14 days of service of the motion to intervene unless the time period is extended or shortened by the presiding officer.
	 4.26(2) When filed. Motion for leave to intervene shall be filed as early in the proceeding as possible to avoid adverse impact on existing parties or the conduct of the proceeding. Unless otherwise ordered, a motion for leave to intervene shall be filed before the prehearing conference, if any, or at least 20 days before the date scheduled for hearing. Any later motion must contain a statement of good cause for the failure to file in a timely manner. Unless inequitable or unjust, an intervenor shall be bound by any agreement, arrangement, or other matter previously raised in the case. Requests by untimely intervenors for continuances which would delay the proceeding will ordinarily be denied.
	 4.26(3) Grounds for intervention. The movant shall demonstrate that: (a) intervention would not unduly prolong the proceedings or otherwise prejudice the rights of existing parties; (b) the movant is likely to be aggrieved or adversely affected by a final order in the proceeding; and (c) the interests of the movant are not adequately represented by existing parties.
	 4.26(4) Effect of intervention. If appropriate, the presiding officer may order consolidation of the petitions and briefs of different parties whose interests are aligned with each other and limit the number of representatives allowed to participate actively in the proceedings. A person granted leave to intervene is a party to the proceeding. The order granting intervention may restrict the issues that may be raised by the intervenor or otherwise condition the intervenor’s participation in the proceeding.