Former Arizona Governor Jan Brewer signed HB 2167 into law, making it illegal to sell, possess or use synthetic marijuana, otherwise known as "K2" or "Spice." (A.R.S. §13-3401) and (A.R.S. § 36-2512) were changed based upon this approved bill.
Laws may have changed since the last time this article was updated. The current and most up-to-date laws can be accessed here and here.