Haw. Rev. Stat. § 46-16.3
Any law to the contrary notwithstanding, the council of any county may adopt and provide for the enforcement of ordinances regulating commercial bicycle tours on state and county highways, including but not limited to ordinances relating to the number of tours, the number of bicycles within a tour, scheduling of tours, physical spacing of tours, rules of the road, health and safety requirements, equipment maintenance, driver and guide qualifications, driver and guide drug testing, accident procedures and reporting, and financial responsibility requirements. Each county shall follow federal guidelines for commercial bicycle tours that begin from federal or state parks and continue on to state highways.
For the purposes of this section:
"Bicycle tour" includes both guided bicycle tours and unguided bicycle rental operations.
"County highway" has the same meaning as defined in section 264-1.
"State highway" has the same meaning as defined in section 264-1.
HRS § 46-16.3