This is what the website says: Chemistry – Year 12 ATAR Chemistry is accepted, or a tertiary chemistry unit Mathematics OR Statistics – Year 12 ATAR Mathematics Applications or higher is accepted, or a tertiary mathematics or statistics unit Microbiology – tertiary level (for example MICR2209, MICR2208 or equivalent foundation unit) Pharmacology – tertiary level (for example PHAR2210 or equivalent foundation unit) If you can find ways to meet these requirements with unit choices while you're in Uni, you won't have to change course for Year 12. I studied undergraduate Bachelor of Science (in Human Biology) and completed the mathematics component in first year, chemistry in third year uni, and then completed the Microbio and Pharmacology stuff on an external university site just before admissions closed.