Rule 411. Any party may file an objection to a petition for leave to intervene or an answer to a request for affirmative relief contained in a petition for leave to intervene on or before the date set for the initial hearing or prehearing conference. The objection or answer shall be served on the person filing the petition and all parties. Any party may file an objection or answer to a petition that is not filed in a timely manner on or before the date set by the presiding officer. The objection shall set out clearly the supporting facts, law, and argument.
Mich. Admin. Code R. 792.10411