Normally, students are limited to 18 units of enrollment per semester. However, students with at least 32 units and whose overall GPA is at least 3.0 may enroll in up to 20 units on a space-available basis on or after the first day of classes. The deadline for adding classes applies. 

Other students may seek approval by petition to enroll in an overload. Petitions must be submitted prior to the deadline for adding classes. In general, overload petitions from students in their first year at Occidental or with an overall GPA of less than 2.7 will not be approved.

Regularly scheduled courses offered for 1 or 2 units may be available for registration through the seventh week of the semester (mid-term) with faculty approval. There is a 2-unit limit for courses added at this time. The Registrar will announce the exact dates for the deadline.