7 CFR §900.57
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
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.