Haw. Code R. § 12-43-113
When an impasse exists, the parties shall notify the board if they have agreed on an alternate impasse procedure, and shall file with the board a copy of the alternate impasse procedure and any amendments thereto. The board shall permit the parties to proceed with their procedure and assist at times and to the extent requested by the parties in their procedure. In the absence of an alternate impasse procedure, the board shall assist in the resolution of impasse in the manner prescribed by this subchapter. If the parties subsequently agree on an alternate impasse procedure, the parties shall immediately notify the board and file a copy with the board, and the board shall discontinue with the procedures initiated pursuant to this subchapter and allow the parties to proceed with the parties' procedure.
Haw. Code R. § 12-43-113