Section Res 210.01 - Intervention(a) A non-party may intervene in a matter pending before the department under the provisions of RSA 541-A:32, by filing a motion stating facts demonstrating that the non-party's rights or other substantial interests might be affected by the hearing or that the non-party qualifies as an intervenor under any provision of law.(b) If the presiding officer determines that such intervention would be in the interests of justice and would not impair the orderly and prompt conduct of the hearing, he or she shall grant the motion for intervention.N.H. Admin. Code § Res 210.01