much smaller Vance mine by 2025. In January 2012, then state opposition LNP leader Campbell Newman announced that if elected his party would restore rights around mining leases to what they were [prior to the NSI Act passed in April 2011] and Sibelco Australia supported his electoral campaign by posting letters to voters by "mine supporters" without required disclosure, urging a vote for Campbell Newman. Sibelco belatedly obtained authorisation and in 2013 filed a disclosure revealing it had spent more than on postage and printing. However, this election promise was not fulfilled, with no restoration of rights to citizens extinguished by the North Stradbroke Island Sustainability Act. Instead, in 2013 the LNP Government passed legislation that allows sand mining on the island for an extra 16 years from 2019 to 2035. The circumstances leading up to this legislative amendment were referred to Queensland's Crime and Misconduct Commission. The public debate concerning sand-mining re-opened in late 2012 when conservationists and Indigenous traditional owners, the Quandamooka people of NSI, discovered that the Enterprise mine had commenced operation in 2004 without Federal government approval under the Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act). As the Enterprise mine operates in close proximity to the Ramsar protected wetlands, experts had advised that the mine was having significant impact on the adjoining wetland, as water used in the sand mine's operation flows into these protected areas. The wetlands are part of complex hydrological systems forming art of the ancient dunes, some up to 300,000 years old, and the long-term impacts on the wetlands are unknown. In August 2013, Friends of Stradbroke Island Inc was preparing to take Sibelco Australia to the Federal Court, as the Federal Government had not taken any steps to enforce Sibelco's compliance with Australian environment protection laws. On 6 June 2014 the Quandamooka people initiated a legal challenge, saying that the LNP Government's extension of mining contravened the Native Title Act 1993 (Cwth). When Labor won office in 2015, the Palaszczuk government returned the end date to 2019. Closure of the sand mines The Yarraman mine closed in 2015. The Enterprise site was wound up in 2019, as per the 2011 legislation, while the much smaller Vance mine will continue to operate until 2025. A statement of intent was signed on 20 February 2019 by Sibelco Australia, the Queensland government and the Quandamooka people, by which the three sand mines