|(a) Any person who has a justiciable or administratively
cognizable interest and who is not an applicant, petitioner, complainant,
respondent, or protestant and who desires to be designated as a party
in any contested case before the Commission may file a petition for
leave to intervene no later than five days prior to the hearing date.
(b) The examiner or the Hearings Director shall promptly
act on all petitions for leave to intervene. All interventions shall
be subject to a motion to strike for having been improperly admitted.