AZ Const., Article XX, Section 4

The people inhabiting this state do agree and declare that they forever disclaim all right and title to the unappropriated and ungranted public lands lying within the boundaries thereof and to all lands lying within said boundaries owned or held by any Indian or Indian tribes, the right or title to which shall have been acquired through or from the United States or any prior sovereignty, and that, until the title of such Indian or Indian tribes shall have been extinguished, the same shall be, and remain, subject to the disposition and under the absolute jurisdiction and control of the Congress of the United States. Taxation