That depends on where in Australia you will be working and the role you'll perform.
Food Safety Supervisors
As per Food Standard 3.2.2A, Food Safety Supervisors must renew their training every five years.
Although we are not permitted to put an expiry date on a Statement of Attainment, it's important to monitor and check you're always within the acceptable five-year period.
Alcohol Servers and Sellers
Alcohol sellers and servers working in the Australian Capital Territory, Victoria, or the Northern Territory must complete refresher training every three years. Those working in New South Wales must complete refresher training every five years.
There is no expiry period for RSA certification in other states or territories.
Other Roles
For other roles there is no expiry period on your Statement of Attainment. However, you should always check if the units of competency have been superseded since you last completed your course.