The Regulation defines key terms under the Biofuels Act 2007, including “biofuel sustainability standard,” which refers to the RSB Principles & Criteria and ISO 13065 standards and “volume fuel service station”. Under Part 2, it mandates that petrol-ethanol blends be as accessible as regular unleaded petrol. It outlines defences for non-compliance with minimum ethanol and biodiesel requirements, including infrastructure upgrades, supply security, and marketing obligations. Grounds for defence also include financial infeasibility and regional transport costs. A two-year exemption period is prescribed for compliance steps, and the Secretary may request information to assess exemption applications. Part 3 requires volume fuel retailers and certain operators to submit electronic returns within one month after each relevant period, detailing fuel availability and infrastructure. Records must include transaction details such as fuel type, blend composition, and sustainability compliance, and be retained for three years. Part 4 repeals the previous regulation and preserves existing acts under it. Schedule 1 specifies penalty notice offences,