Yes, there are. Each case is considered individually. You need to see the appropriate
professor and upon his or her recommendation that you be allowed to add or drop, you
will need signatures on the appropriate forms, usually including the Departmental
Chair, the Dean of Arts and Sciences (or your college) and the Registrar. Simply filling
out a form does not guarantee either a Late Add or a Late Drop. Individuals may either
concur or decline to concur with your request, depending on the relevant circumstances.
Consult University policy in this, as in all such matters.