Australia is considering implementing a mandatory code of conduct for its major supermarkets, with potential fines reaching up to $10 million for violations. This move comes after an interim report highlighted the current voluntary Food and Grocery Code of Conduct as ineffective for supermarkets with annual revenues exceeding $5 billion. The proposed changes aim to address abuses of market power and ensure fair treatment of suppliers and growers, with fines for non-compliance potentially reaching up to $6.6 million. The government supports the recommendations, including making the code mandatory and imposing fines of up to 10% of Coles' and Woolworths' annual revenue for serious breaches. Nationals Senate Leader Bridget McKenzie has long advocated for such measures, while a leading business group warns of possible unintended consequences.