Any course numbered 500 or above is designed for   graduate students and normally carries credit toward one of the graduate   degrees. Certain advanced undergraduate courses numbered in the 300s and   400s also may be approved for a given graduate student, either as a regular   part of his or her graduate program or to remedy a deficiency in   preparation. When a graduate student is permitted to enroll in a course   numbered below 500, the credit prefix E, G, or N may appear on the   registration and record forms. See Grades and Records later in this chapter   for rules related to credit prefixes. No more than 12 credits of courses   numbered between 300 and 499 may be offered in   fulfilling the requirements for advanced degrees. (There are exceptions to   this policy in the M.A.T. and M.S.T. programs.) Students registering in   undergraduate courses are subject to the policies of the undergraduate division   offering the course.