Unless the petition has been summarily disposed of pursuant to section 12-46-65 and subject to section 12-46-25, any interested person may request intervention in a proceeding for declaratory relief. Any person permitted to intervene in a proceeding for declaratory relief may file and serve upon petitioner, a memorandum of authorities which shall state concisely and fully the intervenor's position or contentions and reasons, including legal authorities. The commission's executive director shall be deemed a party without the necessity of formal intervention.
Haw. Code R. § 12-46-66