The General Bulletin states
To audit a course, fill out the Request to Audit Course(s) Form and return it to the Registrar's Office.
"Students may enroll for continuing education or audit of regular academic courses offered on campus on a space-available basis and with the permission of the instructor. Transcripts do not reflect audit courses. Students may not enroll for continuing education credit or audit of regular academic courses offered off campus. In those cases where a student enrolls for a continuing education credit or audit of a regular academic course the fee shall be the same as the tuition paid by regularly enrolled students.