Here are the relevant laws cited on that sign.
https://www.law.cornell.edu/regulations/hawaii/Haw-Code-R-SS-13-146-9
https://www.law.cornell.edu/regulations/hawaii/Haw-Code-R-SS-13-146-28
and here's the parking law...
That's fine; when the government switches parties and the shoe is on the other foot, the other side will raise the same concerns only to be blocked and it flips back and forth; result in us Americans in the center getting spied on by our own...
Ok no problem. Hope you find what you are looking for; sounds like a wonderful trip. In the meantime, in case you haven't heard, you might be interested in this: Dronetag RIDER