Only those subjects with the subject group type as 'PS', 'University Wide' or 'University Wide-Ug' can be registered as additional subjects. You can check the subject details via eStudent > Information > Subject Search. The subject group type can be found in the 'Subject Group Details' block. Please refer to the 'Important Notice' on the same page for more details about the subject group type.
Students of Full-time Undergraduate and Taught-postgraduate programmes can register the additional subjects outside curriculum to broaden their perspective during the last two days of the Add/Drop Period via eStudent, subject to not exceeding the maximum credits allowed and the availability of vacancies.