Can you smoke tobacco under the age of eighteen if you are with someone over eighteen?

Sales of tobacco to children under the age of 18 are illegal in all Australian states and territories.It is also illegal for a person over 18 to give a child under 18 cigarettes or tobacco products. It is not, however, illegal for a person under 18 to purchase cigarettes (only the shop owner is prosecuted), and there is no restriction on the possession and consumption of tobacco for those under 18. The smoking age varies among states and territories but 18 to purchase.