Earlier quoted context omitted.
The state of Hawaii also bans most ads and billboards (they are considered to take away from the natural beauty, which, of course, is a big tourism draw). I find it odd that there is even much debate about it and that most places do not have laws like this: https://www.capitol.hawaii.gov/hrscurrent/vol10_ch0436-0474/...
I agree they're generally ugly. But I assume most places don't ban them due to freedom of speech and private property considerations.
IMHO, Freedom of speech is a very american concept, so I don't think it applies worldwide.
Nevertheless, adds are almost always authorized.