Hey,
From memory your course has 33 credit points of electives.
Generally you will pick ANY major in the university, which will generally take up to 24 credit points. The other credit points (i.e subjects) can be made up of ANY SUBJECTS in the entire university. Just make sure though that NO MORE than 30 credit points are LEVEL 1. You can check this in the university course webpage, they will say what level the subject is e.g. 1,2,3
It is a good idea to map out your degree before you enrol so you dont get stuck. Also some majors may require you to complete some subjects before you do the major e.g. some major may require you to have statistics before you do it, so you can use your free electives for this purpose.
From my knowledge, this course has the most electives in any course in the university - so you have lots of freedom!!
Cheers,Casey