Readers will know that the ACCC has for some time now advocated legislation to address the ongoing issue surrounding the meaning of ‘understanding’ in Part IV of the Act.3 Recently reported comments of the ACCC Chairman Graeme Samuel have added fuel to this debate with his use of the phrase ‘coordinated behaviour’ in the context of the petrol industry. As a result of the ACCC’s recent work focused on the petrol industry, Minister for Competition Policy and Consumer Affairs Dr Emerson wrote to the ACCC on 2 December 2009 requesting it to investigate possible anti-competitive behaviour in the setting of petrol prices in the weekly price cycle. The government has asked for initial advice to be provided before Christmas. We will accordingly report on any developments in this space in early 2010.