I don't know specificity for Australia but Skate 3 is rated Teen by ESRB (generally US and Canada.)
Content is generally suitable for ages 13 and up however by using EA Services, you affirm that you are at least 18 years of age (or have reached the age of majority if that is not 18 years of age where you live.)
Also, if you are experiencing an error related to your age please read this message (XBox 360 users):
Hope this helps.
