Easements in English law are certain rights in English land law that a person has over another's land. Rights recognised as easements range from very widespread forms of rights of way, most rights to use service conduits such as telecommunications cables, power supply lines, supply pipes and drains, rights to use communal gardens and rights of light to more strained and novel forms. All types are subject to general rules and constraints. As one of the formalities in English law express, express legal easements must be created by deed.