Illegal miners work in an open air pit tin mine on Bangka island September 24, 2013. Indonesia's bold attempt to challenge the London Metal Exchange (LME) for supremacy in the global tin market by imposing strict export rules and driving up prices looks to be paying off. Indonesia hopes the new rules will also deter illegal tin mining and set a blueprint for other commodities where the country is the world's biggest exporter, such as palm oil, thermal coal and nickel ore, industry and government sources said.