A grocery industry code of conduct aimed at curbing unfair treatment of suppliers by the major supermarket chains will be enacted within days, more than two years after talks commenced between Coles, Woolworths and the food and grocery industry. The Minister for Small Business, Bruce Billson, said the code had been significantly strengthened after an extensive consultation process to prohibit "unacceptable" practices and unfair changes to supply agreements that might not have been banned under the original proposal agreed to by Coles, Woolworths and the Australian Food & Grocery Council in November 2013.