… Center. Is there a deadline to add or drop courses? Yes, deadlines to add or drop courses are published in the Academic Calendar and the Schedule of Courses. What do enrollment requirements such as pre-requisite, co-requisite, and advisory mean? … to meet as a condition of enrolling in a course or a program. Co-requisite: a requirement that must be satisfied at the time a particular class is taken; usually a co-requisite is concurrent enrollment in another class but may in certain …