When a request for hearing has been assigned to a hearings officer for hearing or further proceedings, the powers and duties to be performed by the hearings officer in connection with the proceeding, without abatement of the proceeding, may be assigned to another hearings officer, provided no hearings officer shall render a written decision unless that hearings officer was present at opening and closing arguments and all presentations of evidence concerning those matters.
Haw. Code R. § 3-126-54