Rule 15. Intervention

     A party who was allowed to intervene before the Board may proceed before the Court as an intervenor without filing a motion, but shall serve on all parties and file with the Clerk, within 60 days after the date of the Clerk’s Notice of Docketing in accordance with Rule 4(b), a notice of intent to intervene. A person who did not intervene before the Board and who desires to intervene before the Court in a proceeding initiated by a Notice of Appeal or a petition for extraordinary relief shall serve on all parties and file with the Clerk, within 30 days after the filing of a petition for extraordinary relief or within 60 days after the date of the Clerk’s Notice of Docketing in accordance with Rule 4(b), a motion for permission to intervene. The motion must contain a concise statement of the interest of the moving person or party and the grounds upon which intervention is sought and should advise the Court of opposition to the motion, if any. A motion for permission to intervene beyond this time limit will be granted only in extraordinary circumstances.