Recent article in Honolulu Star*Advertiser about illegal rental units:
"Hundreds of illegal vacation rentals generating millions of dollars could be shut down under a proposal city officials hope will make it easier to enforce the law that bans short-term rentals without a permit."
"A proposed ordinance would require vacation rental owners to include their city permit numbers on any advertisements in an effort to deter illegal businesses. The bill has come up before without success in the decades-old debate about vacation rentals on Oahu."
This issue comes up almost every year on at least one of the islands.