Occupiers' liability is a field of tort law, codified in statute, which concerns the duty of care owed by those who occupy real property, through ownership or lease, to people who visit or trespass. It deals with liability that may arise from accidents caused by the defective or dangerous condition of the premises. In English law, occupiers' liability towards visitors is regulated in the Occupiers' Liability Act 1957. In addition, occupiers' liability to trespassers is provided under the Occupiers' Liability Act 1984. Although the law largely codified the earlier common law, the difference between a "visitor" and a "trespasser", and the definition of an "occupier" continue to rely on cases for their meaning.