One type of these is known in the common law as profit a prendre.
One type of these is known in the common law as profit a prendre. In Willard v. First Church of Christ, it was held that the common law prevented them from being reserved to third parties. Courts typically favor interpreting them as appurtenant, in which case there exists a dominant tenement and a servient tenement. When they are in gross, they attach personally to the holder and are usually alienable. They can be obtained by prescription, which is analogous to adverse possession, or by necessity which happens when there is severance ►of commonly owned parcels. FTP, name this legal term usually used to describe a right to use real property, like walking across another person's driveway.   
One type of these is known in the common law as profit a prendre.
easements