We do not provide personal liability for the use of mechanical vehicles. On this basis, you will need to get personal liability insurance through your car hire company.
Check with the car hire company to see exactly how much third party liability cover is provided. Some car rental companies will only provide the legislated minimum, which varies between states and can be as low as $10,000. We would suggest that you acquire at least $1,000,000 liability cover, which can be purchased separately if it’s not included as standard through your car rental company.