HRS §445-114
Posting signs on public property is illegal
This law makes it illegal to put up signs, posters, or notices on public things like poles, trees, or street signs. There are exceptions for public officers doing their job and for private people giving legal notice, but not on utility poles. County rules or state or federal laws may allow some postings.
everyone
The statute, as written — Unlawful posting in public places
Except for a public officer in performance of a public duty, or a private person in giving legal notice on other than utility poles, it shall be unlawful for any person to paste, post, paint, print, nail, tack, or otherwise fasten any card, banner, handbill, sign, poster, outdoor advertising device, or notice of any kind or cause the same to be done, on any curbstone, lamppost, utility pole, streetlight pole, hydrant, bridge, tree, street sign, traffic sign, or traffic light upon any public property in the State, except as may be required by the ordinances of the county where it is posted, or by the laws of this State or of the United States.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.