Property law: Related topics - Prior appropriation water rights + Nemo dat quod non habet + Quicquid plantatur solo

Prior appropriation water rights is the legal doctrine that the first person to take a quantity of water from a water source for "beneficial use" (agricultural, industrial or household) has the right to continue to use that quantity of water for that purpose.

Subsequent users can take the remaining water for their own beneficial use if they do not impinge on the rights of previous users.

The doctrine developed in the Western United States and is different from riparian water rights, which are applied in the rest of the United States. Water is very scarce in the West and so must be allocated sparingly, based on the productivity of its use. The right is also allotted to those who are "first in time of use."

water appropriation problems to light. Matthew Irwin diverted a stream for his mining operation. Shortly afterward, Robert Phillips started a mining operation downstream and eventually tried to divert the water back to its original streambed. The case was taken all the way to the California Supreme Court, which ruled in favor of the appropriation law.

Nemo dat quod non habet, literally meaning "no one gives what they do not have" is a legal rule, sometimes called the nemo dat rule, that states that the purchase of a possession from someone who has no ownership right to it also denies the purchaser any ownership title. It is equivalent to the civil (continental) Nemo plus iuris ad alium transferre potest quam ipse habet rule, which means "one cannot transfer to another more rights than they have". The rule usually stays valid even if the purchaser does not know that the seller has no right to claim ownership of the object of the transaction (a bona fide purchaser); however, in many cases, more than one innocent party is involved, making judgment difficult for courts and leading to numerous exceptions to the general rule that aim to give a degree of protection to bona fide purchasers and original owners. The possession of the good of title will be with the original owner.

Quicquid plantatur solo, solo cedit (Latin, "whatever is affixed to the soil belongs to the soil") is a legal Latin principle related to fixtures which means that something that is or becomes affixed to the land becomes part of the land; therefore, title to the fixture is a part of the land and passes with title to the land. Consequently, whosoever owns that piece of land will also own the things attached.