Everything under the 1957 Act turns on definitions: get occupier, visitor or premises wrong and the whole analysis collapses. This chapter opens with the Act's scope and key terms, including the control test for occupier status, before examining how visitor status is gained through express or implied permission, contract or legal right — and lost by exceeding it. It then sets out the common duty of care, with the adjusted standards for children, allurements and skilled visitors, and how the duty can be discharged through adequate warnings or by entrusting work to an independent contractor. It closes with the defences of volenti and contributory negligence, and the limits that statute places on excluding liability, which differ between business and private occupiers.