Government through the Directorate General of Oil and Gas Ministry of Energy and BP Migas to approach foreign contractors who allegedly have unresolved tax issues, among others, the contractor originally from England who had started operating since the 1990s. Total rest of the money reached Rp 4 trillion. This is because of differences in understanding of tax treaties by foreign contractors 10 percent tax treaty. While BPKP it reached 20 percent. This problem does not occur on American contractor who had just started operations in the year 2000's, after the oil and gas law problems (Kompas.com 28 September 2011).