Estates and future interests Land ownership in American law is highly complex, based on feudal categories inherited from English law. Although
feudalism is no longer relevant in the modern United States, the law in most states have not been simplified to reflect modern circumstances. However, new types of land ownership is generally disallowed, under the
numerus clausus principle, unless they are introduced by legislation. In most states, full ownership of land is known as
fee simple, fee simple absolute, or fee. Fee simple refers to a present interest in the land, which continues indefinitely into the future. One other type of ownership is the
defeasible fee, which is like fee simple, except that it can end upon some event occurring. The defeasible fee is sometimes seen with property donated to charity for a specific use, where the grantor specifies that the ownership may end if the property is no longer used in a certain way. Another type of present interest is the
life estate, by which the grantor gives the life tenant full rights during the life tenant's life. But after his death, the estate will either go back to the grantor (known as a
reversion) or to another person (known as a
remainder). Remainders can be vested or conditional, based on conditions of the remainder. Remainders are "vested" when the condition of the remainder is fulfilled, even if the possession has not yet been transferred. For example, in a grant "to A for life, then to B if he graduates high school by age 18", the remainder to B vests when B graduates high school by age 18, although the possession will not transfer until A dies. There is also the
executory interest, which is a future interest that cuts off a preceding interest when a condition is met. The focus on vesting is important in many states because contingent remainders (and certain other future interests) are invalidated if they might vest after the period defined by the
Rule Against Perpetuities (RAP). The Rule Against Perpetuities traditionally requires an interest to vest "if at all, not later than twenty-one years after some life in being at the creation of the interest." Any future interest not conforming to the Rule Against Perpetuities is traditionally invalid. Many states have reformed the RAP with "wait-and-see statutes" or abolished it all together.
Co-ownership Under the common law, real estate can be jointly owned at a given time. In most states, in a
tenancy in common, co-tenants each have a theoretical right to possess the whole property. Co-tenants must also share rents received from third-parties, as well as upkeep expenses and taxes. However, if they cannot work out how to divide the use of the property, one co-tenant can prevent another from taking possession, but must be liable to the ousted tenant for the rent. == See also ==