Correct, UAC states that to apply for EAS you must be able to demonstrate that, as a result of circumstances beyond your control or choosing, your studies were negatively affected (usually for at least six months) during Year 11 and/or Year 12.
The Educational Access Scheme (EAS) helps students who have experienced long-term educational disadvantage gain admission to tertiary study.
www.uac.edu.au
I hope this helps!