Sections in Place wherever the land surveys placed them. The State chose the lands acquired in the Indemnity in Lieu Selections, Quantity Grant Selections, and Land Exchange processes. These choices were made by the State Selection Board, which consists of the Governor, State Attorney General, and State Land Commissioner. The Land Commissioner in recent years has been replaced on the Board by the State Treasurer. Most of the selections were made in the 1915–1960 era, with the selection program being finally completed in 1982. Since the State was precluded by Federal laws from acquiring mineral lands, and since the homesteaders had already acquired most of the potential agricultural lands, the State focused on choosing the best grazing lands. Most of the acreage chosen during the 1915–1960 era was in central and southeastern Arizona, and in the checkerboard land area along the railroad across north-central Arizona. As agriculture developed in Arizona, later selections were made in irrigated areas in the Harquahala Valley and the Gila River Valley. The final selections concentrated on commercial and agricultural lands along the Colorado River. Land exchanges in the 1935–1985 era relocated most of the school section lands out of the western deserts and into areas close to Phoenix and Tucson and into better grazing lands in such areas as western Yavapai County. Location & Uses of State Trust Land Most of Arizona Trust lands are currently usable only for livestock grazing purposes. Several hundred thousand acres of these grazing lands have become urban lands as Phoenix, Tucson, and other cities and towns have expanded. The Urban Lands Act, passed in 1981, enabled the Trust to capitalize on the large increase that planning and zoning adds to raw land values. Today the Land Department's urban lands lease and sale program is the largest revenue producer for the Trust. Nearly all of the most valuable urban Trust lands around the northern border of the Phoenix metropolitan area and north and west Tucson are Common Schools Trust lands. The large block of Trust lands on the south and southeast sides of the Tucson metropolitan area is divided amongst the various institutional Trusts. The University of Arizona Trust owns a large amount of timbered land acreage in the Flagstaff area and agricultural lands near Yuma. However, the majority of the acreage in the other individual institutional Trusts are rural grazing lands, although some agricultural potential exists. In the 88