(1) Upon motion, any person may request status as an intervenor in a case. The motion shall state the applicant's interests relating to the subject of the action, how disposition of the action may impair that interest, and whether that interest is adequately represented by existing parties. The motion shall specify the legal issue(s) in the case which the intervenor seeks to address and may not raise new issues beyond the issues already in the case. In determining whether a person qualifies as an intervenor, the presiding officer shall apply any applicable provisions of law. Granting intervention must be in the interests of justice and shall not impair the orderly and prompt conduct of the proceedings.

(2) The motion to intervene shall be filed at least thirty days prior to the deadline for filing the initial hearing brief, unless good cause is shown. The applicant should contact the parties so that the motion may be filed without objection.

(3) If the person qualifies for intervention, the presiding officer may impose conditions upon the intervenor's participation in proceedings, either at the time that intervention is granted or at any subsequent time. Conditions may include:

(a) Limiting the intervenor's participation to designated issues in which the intervenor has a particular interest as demonstrated by the motion;

(b) Requiring two or more intervenors to combine their presentations of evidence and argument, or requiring intervenor to combine its argument with the party whose position the intervenor supports; and

(c) Limiting the intervenor's role in settlement proceedings.

(4) Pleadings and briefs of an intervenor shall be filed and served in accordance with the deadlines applicable to the party whose position the intervenor supports, in accordance with the board's order on intervention.

(5) An intervenor is subject to dismissal pursuant to WAC 242-03-710.