Papers which have a large amount of content in common are often restricted against each other. This means that you are normally unable to take both papers. For example, if you have passed STAT 110, you are normally unable to take STAT 115, as these papers are restricted against each other.
Restrictions are used to prevent students from receiving credit twice for substantially similar content within the same qualification. If two papers are restricted against each other, only one can normally be credited toward your degree.
Details about any restrictions are listed against each paper in the Prescriptions section of the Guide to Enrolment, or in the individual paper details on the Subjects and Papers page. It is important to check restrictions before enrolling, particularly if you are changing programmes, majors, or selecting papers in a similar subject area.
Further information