Haw. Rev. Stat. § 291C-195: Driving of mopeds.

(a) Notwithstanding section 286-81(b), no person:

(1) Less than sixteen years of age shall drive a moped on a highway, street, or roadway, or any other public property in the State; and

(2) Shall drive a moped unless the person wears a safety helmet securely fastened with a chin strap.

The safety helmet shall meet the specifications and requirements established by rules adopted by the director.

(b) No person shall drive a moped except while sitting astride the seat, facing forward, with one leg on each side of the moped.

(c) No person shall drive a moped which is carrying any other person nor shall any person other than the driver ride upon a moped.

(d) Subsections (b) and (c) shall not apply to three-wheeled mopeds designed to carry a driver and passenger seated side by side.

(e) Three-wheeled mopeds shall be insured for liability and property damage, excluding personal injury protection.