As reported here, a lawsuit was filed in Arizona state courts seeking to invalidate Sedona, Arizona's prohibition on short-term rentals (less than 30 days):
Approximately 450 short-term rental properties in Sedona have been impacted by the new Ordinance making it illegal to advertise short-term rentals, and the Code prohibiting short-term rentals.
This ordinance was enacted by the city council Jan. 22 to put teeth into the Code, on the books since 1995, which made it illegal to rent properties for less than 30-days
The tail end of the article lists the claims asserted by the plaintiffs, which include vested rights, selective enforcement, and other constitutional and statutory claims.