See Notes
GST status depends on the specific circumstances. See the ATO notes below.
ATO Reference
#1210
ATO Notes
Food past its use-by date is not automatically unfit for human consumption but you can use the use-by date as a guide to working out whether the food is suitable for human consumption. If the food is safe for human consumption, it is still considered food under the GST law and is GST-free unless an item in Schedule 1 applies.