High Quality Content by WIKIPEDIA articles! The Occupiers` Liability Act 1984 (c. 3) is an Act of the Parliament of the United Kingdom that covers occupiers` liability for trespassers. In British Railways Board v Herrington 1972 AC 877, the House of Lords had decided that occupiers owed a duty to trespassers, but the exact application of the decision was unclear. The matter was then referred to the Law Commission for a report, and as a result the Occupiers` Liability Bill was introduced to Parliament by Lord Hailsham on 23 June 1983. The Act was given the Royal Assent on 13 March 1984 as the Occupiers` Liability Act 1984 and came into force on 13 May.