Marijuana is only legal in the state of Arizona for medical purposes; in order use marijuana, you have to have a valid ARIZONA medical marijuana card and be obeying the law. Thus, if you’re card is not officially you registered, you are not permitted to use marijuana. Even if you do have a card, there are still some restrictions. For instance, you cannot use medical marijuana on a college campus, nor can you use marijuana while possessing a firearm. Be careful–even the smell is enough for probable cause for you or your property to be searched.
Arizona has one of the strictest Marijuana laws in USA. However, according to the Arizona Medical Marijuana Act, people can possess Marijuana for medical purposes. The same laws are even applicable for tourists. However, use of Marijuana for recreational purposes is still banned in Arizona. Arizona Regulation and Taxation of Marijuana Act Initiative (2016), which is expected to come for voting, could make Marijuana legal for both locals and tourists.
Marijuana use in Arizona is against the law unless you possess a medical marijuana card, this is the result of a law that was passed in 2010. The laws for the most part do not differ between tourists and locals, if you have a valid medical marijuana card from another state you can use it in Arizona. However the big different is non-residents cannot buy marijuana in Arizona, so you’ll either have to bring your own or smoke someone else’s.