50 C.F.R. § 18.85
Waiver of right to participate
Any person who fails to notify the Director of his intent to participate pursuant to § 18.75 or § 18.84 shall be deemed to have waived his right to participate as a party.
Any person who fails to notify the Director of his intent to participate pursuant to § 18.75 or § 18.84 shall be deemed to have waived his right to participate as a party.