(1) Any person or agency whose interest may be substantially affected by an appeal may petition the board to be granted status as an intervenor in the appeal.

(2) In determining whether a petitioner qualifies as an intervenor, the presiding officer shall apply the rules of the superior courts of this state.

(3) If the petitioner qualifies for intervention, the presiding officer may impose conditions upon the intervenor's participation in the 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 petition;

(b) Limiting the intervenor's use of discovery, cross-examination, and other procedures so as to promote the orderly and prompt conduct of the proceedings; and

(c) Requiring two or more intervenors to combine their presentations of evidence and argument, cross-examination, discovery, and other participation in the proceedings.

(4) The presiding officer may timely grant or deny each petition and specify conditions, if any.