Absolute Prerequisites (PA)
The reference “absolute prerequisite” (PA) on the grid of a program of studies is to identify a course which must be completed before registering for the course for which it is considered a prerequisite. If you receive the reference “EC” or “IN” for a course that is considered an “absolute prerequisite,” you cannot register for the following course.
Corequisite Course (CR)
The reference “corequisite course” identifies a course that you must take before or at the same time as another course. When you take a corequisite course and its complementary course at the same time, you cannot cancel the course identified as CR without cancelling the other course.