40 CFR § 179.42 - Notice of participation.
(b) A person desiring to participate in a hearing must file with the hearing clerk within 30 days after publication of the Notice of Hearing under § 179.20, a Notice of Participation in the following form:
(c) An amendment to a Notice of Participation must be filed with the hearing clerk and served on all parties.
(e) The presiding officer may permit the late filing of a Notice of Participation upon a showing of good cause. Arrangements and agreements previously made in the proceeding shall apply to any party admitted late.
(f) The presiding officer may strike the participation of a person for failure to comply with any requirement of this subpart. Any person whose participation is striken may obtain interlocutory review thereof by the Administrator.