This dataset is a spatial representation of the exclusion area described in the document 'Prohibition and revocation on entering or remaining in certain areas of Lord Howe Marine Park' (Environment Protection and Biodiversity Conservation Regulations 2000, Subregulation 12.23(3), 2020).Part of the northern-most National Park Zone of Lord Howe Marine Park, which includes part of Middleton Reef, has been closed following a report of a suspected unexploded ordnance (UXO).An exclusion zone of 500 metres from a submerged UXO has been established.For more information see: https://parksaustralia.gov.au/marine/parks/temperate-east/lord-howe/The Lord Howe Island Australian Marine Park zoning boundaries can be found in the Australian Marine Parks dataset: https://fed.dcceew.gov.au/datasets/erin::australian-marine-parks/about