The best way to be sure a food is egg free is to read the label. Manufacturers of foods sold in the Australia must list on their labels whether a food contains any of the most common allergens. This means that you should be able to find statements like these somewhere on the label: "contains egg ingredients," "made using egg ingredients," or "made in a facility that also processes eggs."
These label requirement makes things a little easier than reading the ingredients list — instead of needing to know that the ingredient "ovoglobulin" comes from egg protein, you should be able to tell at a glance which foods to avoid. Still, to make sure the foods you eat are egg free, you'll need to be on the lookout for any ingredients that might come from eggs. That means asking questions when eating out at restaurants or at a friend's home and carefully reading food labels.
When you eat in a restaurant or at a friend's house, call ahead before hand to establish how foods are cooked and what's in them. In some cases, you may want to bring your own food with you. When you're shopping, look for egg-free alternatives to foods that usually contain eggs, such as pasta.
Be aware that egg yolks are sometimes used to glaze pretzels, bagels, and other baked items. Eggs are also often used as a foaming agent in beer, lattes, or cappuccinos. Even some makeup, shampoos and medicines contain egg proteins.
People with an egg allergy may find that the health food section of the grocery store offers the most options. That's where you'll find vegan foods that are made without eggs or egg products.