N.D. Cent. Code § 28-32-28

An administrative agency may grant intervention in an adjudicative proceeding to promote the interests of justice if intervention will not impair the orderly and prompt conduct of the proceeding and if the petitioning intervenor demonstrates that the petitioner's legal rights, duties, privileges, immunities, or other legal interests may be substantially affected by the proceeding or that the petitioner qualifies as an intervenor under any provision of statute or rule. The agency may impose conditions and limitations upon intervention. The agency shall give reasonable notice of the intervention to all parties. An administrative agency may adopt rules relating to intervention in an adjudicative proceeding.