Complex sentence: The site contains two graves, and in 2000 the National Parks and Wildlife Service placed a boundary fence around them; the site was subsequently gazetted on 10 March 2006 under the "Heritage Act" as being of state significance.
Split into simpler sentences: The site contains two graves, and in 2000 the National Parks and Wildlife Service placed a boundary fence around these sites. The grave site was gazetted on 10 March 2006 under the "Heritage Act" as being of state significance.