Under Proposition 203 Arizona welcomes California medical marijuana card holders!
California card holders will be legal to possess and use marijuana in Arizona and be afforded the same protections from discrimination (including discrimination by employers) as Arizona medical marijuana patients. Californians just can't obtain their meds from an Arizona dispensary.
From Prop 203:
36-2804.03. Issuance of registry identification cards.
Section C. A REGISTRY IDENTIFICATION CARD, OR ITS EQUIVALENT, THAT IS ISSUED UNDER THE LAWS OF ANOTHER STATE, DISTRICT, TERRITORY, COMMONWEALTH OR INSULAR POSSESSION OF THE UNITED STATES THAT ALLOWS A VISITING QUALIFYING PATIENT TO POSSESS OR USE MARIJUANA FOR MEDICAL PURPOSES IN THE JURISDICTION OF ISSUANCE HAS THE SAME FORCE AND EFFECT WHEN HELD BY A VISITING QUALIFYING PATIENT AS A REGISTRY IDENTIFICATION CARD ISSUED BY THE DEPARTMENT, EXCEPT THAT A VISITING QUALIFYING PATIENT IS NOT AUTHORIZED TO OBTAIN MARIJUANA FROM A NONPROFIT MEDICAL MARIJUANA DISPENSARY