If the class you’d like to register for is closed, you can continue to check back to see if the class has reopened up until the day before the course begins. Once the course begins, the registration system will require an Add Authorization Code in order to register, which you must obtain from the instructor.
You may attend the first class meeting to ask the instructor for an ADD PERMIT with an Add Authorization Code (AAC). If the instructor gives you an add permit, follow the instructions on the permit to register for the course by the stated deadline.
If you have any further questions about Add Permits, contact Enrollment Services at (714) 432-5072.