I think I understand what you're asking.
Usually if you choose a standard Bachelor of Arts, you should be able to major (or specialise) in a particular field. Typically you're allowed up to two majors. The problem here is that I'm unsure as to whether UTS is offering a normal Arts degree or whether they're offering "tagged degrees". Tagged degrees are different from your standard degrees in that they usually allow for a more in-depth study, while sacrificing flexibility. When you study a tagged degree you normally don't get to choose a major because the degree is already focused on a particular area of study. For example, I'm currently studying a Bachelor of Applied Finance & Bachelor of Commerce - Professional Accounting at Macquarie University. For my second degree, I don't get to choose any majors because the degree is technically a specialised accounting degree. If I chose to study a normal Commerce degree I'd be able to choose whether I wanted to do accounting, marketing, human resources or any other Commerce major. I am guessing the same concept applies here.
In other words (pretty sure I've confused you here - sorry), you need to ring up the university and ask them directly.