The pressure's on

Your LPG installation must comply with Australian Standard AS 1425 which states LPG cylinders, whether for the barbecue, car or whatever, must be pressure-tested every 10 years. It's illegal to refill a tank older than 10 years if it hasn't been tested. If it hasn't, operators at LPG refilling stations will refuse to fill it. In your case, you are the operator refilling the tank, thus you are breaking the law if you refill an untested 10-year-old tank. The onus is on you to have the tank checked when the 10 years are up. If you don't, in the eyes of the law you are driving an unroadworthy car. As a consequence, your insurance company might refuse to pay in the event of an accident and you could be charged with driving an unroadworthy vehicle. The reality is, your tank is likely to be checked only when the car has a roadworthy check in the process of changing ownership. The inspector will check the date of the tank's last pressure test and will fail the car if 10 years have elapsed. The bad news is, most testing stations require you to remove the tank from your car before they test it. The cost of the test is typically about $75, depending on the type and any parts that might be required. After testing it will be validated for use for another 10 years.