HRS §328J-2
No smoking in state or county buildings and vehicles
This law bans smoking in any enclosed or partly enclosed space that the state or a county owns, leases, or runs. That includes buildings and vehicles. If you are in such a place, you cannot smoke.
everyone
The statute, as written — Prohibition in facilities owned by the State or the counties
Smoking shall be prohibited in all enclosed or partially enclosed areas, including buildings and vehicles owned, leased, or operated by the State or any county.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.