If you started your degree before 2025 your study plan may include courses from CBE Lists. Your degree page on Program and Courses will let you know how many courses from what lists you are required to complete.
You will need to choose courses from the List that do not appear elsewhere in your degree, as you are not able to double-count a course towards the same degree, or towards two degrees (in the case of a flexible double degree).
If in doubt, please contact CBE Student Services.