Two and one-half ounces of usable marijuana
Yes, if residence is further than 25 miles from a state-licensed dispensary facility. No more than twelve marijuana plants in an "enclosed, locked facility."
Yes, state-licensed nonprofit dispensaries may produce and dispense marijuana to authorized patients on a not-for-profit basis.
Yes, the act provides a limited reciprocity to 'visiting qualifying patients'. In order to qualify, the patient: (1) must not be a resident of Arizona (or has resided in Arizona for less than 30 days), (2) must have been diagnosed with a medical condition recognized under the Act, and (3) must possess a medical marijuana registration card or its equivalent that was issued pursuant to the laws of another state. The out-of-state registration card has the same force and effect as a card issued in Arizona except that the visiting qualifying patient may not purchase medical marijuana in Arizona.