About ASIC: Australian Securities and Investments Commission
ASIC is Australia’s corporate, markets and financial services regulator.
We contribute to Australia’s economic reputation and wellbeing by ensuring that Australia’s financial markets are fair and transparent, supported by confident and informed investors and consumers.
RG 235 Registering your business name
From http://download.asic.gov.au/media/1247075/rg235.pdf
This guide is for people who wish to run a business in Australia using a business name.
This guide explains when you must register your business name, how to register your business name and how to maintain your business name after it is registered.
It also gives some guidance about business names that were previously registered in a state or territory.