(A) Upon timely application anyone shall be permitted to intervene in an action when the applicant claims an interest relating to the allegations of the complaint and he is so situated that the disposition of the action may as a practical matter impair or impede his ability to protect that interest, unless the applicant’s interest is adequately represented by existing parties.

(B) Upon timely application anyone may be permitted to intervene in an action when an applicant’s claim or defense and the main action have a question of law or fact in common. In exercising its discretion, the panel shall consider whether the intervention will unduly delay or prejudice the adjudication of the rights of the original parties.

(C) A person desiring to intervene shall timely serve a motion to intervene upon the panel. The motion shall state the ground therefor and shall be accompanied by a statement setting forth the claim or defense for which intervention is sought.