To have a course requirement enforced, the course must have an Enrollment Requirement Group (ERG) code constructed and the "Enforced Prerequisites" field must be populated in the request in ECAS. The text in this field is interpreted literally and can only include items that can be found on students' records (e.g., courses taken, major plan codes, student groups, and academic levels in 15 credit increments). Grade points cannot be used as criteria. Conventions include using "or" and "and" between conditions where appropriate, or commas for a sequence of conditions. Courses can be required either as a prerequisite or a co-requisite, the latter designated by an ampersand (&) before the course designator number.
"Consents" is yet another separate field of "buttons" in ECAS. There can only be one form of consent on a course. Putting "instr consent" or "dept consent" in this field means a student must obtain a permission number.