The substantive provisions of the Work Choices amendments to the Workplace Relations Act 1996 (Cth) came into effect on 27 March 2006. Work Choices fundamentally alters the regulation of workplace relations in Australia. It creates a (almost) national workplace relations system through its application of the constitutional corporations and by largely overriding the industrial relations legislation of the States and Territories. Significant among the changes made by Work Choices is the change to the traditional dispute resolution role performed by the Australian Industrial Relations Commission (the AIRC).