Intervention
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
Intervention in proceedings subject to this subpart shall not be allowed, except that, in the discretion of the Secretary or the judge, any person (other than the petitioner) showing a substantial interest in the outcome of a proceeding shall be permitted to participate in the oral argument and to file a brief.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.