In a statement, the ACMA said these rules were intended to cover systems that enabled vehicle-to-vehicle, vehicle-to-person or vehicle-to-infrastructure communications.
The rules, issued under the name Radio communications (Intelligent Transport Systems) Class Licence 2017, had been issued after industry consultation, and would support use of complying wireless technologies and devices.
"ITS are expected to make roads smarter, safer and cleaner through the use of communications technologies," said ACMA acting chair James Cameron.
The new rules allow use of the 5.9 GHz band for ITS in Australia, and are consistent with arrangements in the US and the EU.
The ACMA said harmonising Australia’s ITS arrangements with wider global developments means Australian motorists would be more likely to enjoy the benefits of connected vehicles as they became available.