Ariz. Const. art. V, § 7

Every bill passed by the legislature, before it becomes a law, shall be presented to the governor. If he approve, he shall sign it, and it shall become a law as provided in this constitution. But if he disapprove, he shall return it, with his objections, to the house in which it originated, which shall enter the objections at large on the journal. If after reconsideration it again passes both houses by an aye and nay vote on roll call of two-thirds of the members elected to each house, it shall become a law as provided in this constitution, notwithstanding the governor's objections. This section shall not apply to emergency measures as referred to in section 1 of the article on the legislative department.

If any bill be not returned within five days after it shall have been presented to the governor (Sunday excepted) such bill shall become a law in like manner as if he had signed it, unless the legislature by its final adjournment prevents its return, in which case it shall be filed with his objections in the office of the secretary of state within ten days after such adjournment (Sundays excepted) or become a law as provided in this constitution. After the final action by the governor, or following the adoption of a bill notwithstanding his objection, it shall be filed with the secretary of state.

If any bill presented to the governor contains several items of appropriations of money, he may object to one or more of such items, while approving other portions of the bill. In such case he shall append to the bill at the time of signing it, a statement of the item or items which he declines to approve, together with his reasons therefor, and such item or items shall not take effect unless passed over the governor's objections as in this section provided.

The veto power of the governor shall not extend to any bill passed by the legislature and referred to the people for adoption or rejection.