Haw. Code R. § 19-43-36
Except in a period of emergency determined by the department, an officer of a county fire or police department, or state law enforcement officer, or in compliance with the directions of a police officer, state law enforcement officer, or traffic control sign or signal when, during meter operating hours, any vehicle is parked, stopped or standing in any parking stall alongside or next to which a parking meter is located, the operator of such vehicle shall, upon entering the parking stall, immediately deposit or cause to be deposited in the parking meter, such proper coin of the United States as is required for such parking meter. When designated by proper directions on the meter, and when required by the directions on the meter, the operator of such vehicle, after the deposit of the proper coin or coins, shall also set in operation the timing mechanism on such meter in accordance with the directions properly appearing thereon.
The failure to deposit such proper coin, and the failure to set the timing mechanism in operation when so required, shall constitute a violation of this section.
Upon the deposit of such coin (and the setting of the timing mechanism in operation when so required) the parking stall may be lawfully occupied by such vehicle during the period of time which has been prescribed for the area in which the parking stall is located, provided that any person placing a vehicle in a parking meter stall adjacent to a meter which indicates that unused time has been left in the meter by the previous occupant of the stall shall not be required to deposit a coin so long as the occupancy of the stall does not exceed the indicated unused parking time.
Haw. Code R. § 19-43-36