 However, the Western Australian government, responding to a question in parliament, has argued for a much lower figure, suggesting that approximately 4 percent of sites, representing approximately 7.2 percent of petroglyphs, have been destroyed since 1972.However, as the Western Australian government has noted, there is no complete inventory of rock art in the region, making assessments of current and future impacts on the site a challenging task.In 1996, a "Burrup Peninsula Land Use Plan and Management Strategy", prepared by the Burrup Peninsula Management Advisory Board, presented an approach to multiple land use on the Burrup Peninsula.