The modification of an existing instream flow standard by the commission may be initiated by the commission or by a petition to the commission by any interested person. The petition for modifying instream flow standards shall be made on forms provided by the department. The procedure for modifying an existing instream flow standard shall be similar to that for the establishment of an instream flow standard; provided that insubstantial modification may be determined and authorized without notice or hearing by the commission and provided, further, that the commission shall hold a hearing upon the written request of any person adversely affected by such order.
Haw. Code R. § 13-169-36