that was formally owned at the time of the Revolutionary War, most American landholders can trace their title back to grants by the federal or state governments of land obtained by purchase (Louisiana Purchase, Florida, Alaska), treaty (the Ohio Valley, New Mexico, Arizona, and California), or annexation (Texas, Hawaii). However, in reality, grants made prior to those territories becoming U.S. possessions were recognized; ownership under French and Spanish crown grants in the Louisiana Purchase and Guadalupe-Hidalgo/Gadsden territories remained valid. Although in Dartmouth College v. Woodward the United States Supreme Court rebuffed New Hampshire's attempt to convert Dartmouth College from a private college into a public university, the Court decided this was based on the Constitution prohibiting states from impairing the obligations of the contract which created the private corporation that owned the land, and not based on any principle that the land was somehow immune from state control. Many state constitutions (Arkansas, Wisconsin, Minnesota, New York) refer to allodial title, but only to clearly distinguish it from feudal title. The conditions under which the government can compel the sale of privately owned real property for public necessity are established by eminent domain laws of either the federal or state governments, respectively. The Fifth Amendment to the United States Constitution requires just compensation for eminent domain compelled sale. In addition, the government powers of police power and escheat have been retained in the American legal system. Limited allodial title Other institutional property ownership can also be called allodial, in that property granted for certain uses is held absolutely and cannot be alienated in most circumstances. For example, universities and colleges that hold property for educational purposes can be described as having allodial title. In most states, property held by churches for the purpose of worship also has status similar to allodial title. Native American reservations also share some similarity with allodial title. However, in all these cases, it is also clear that if the title ceases to be used for the purposes for which it was granted, it reverts to the state or the federal government. Nevada In 1997, the Nevada Legislature created a new section of statutes within the property tax statutory scheme. Nevada Revised Statutes (NRS) 361.900 to 361.920. These statutes, which are entitled "Allodial Title", became effective on 1 July 1998, and were intended to protect property owners from the burden of the high increases in property taxes