All undergrads can enroll in up to 18 units without permission, when their enrollment windows open. This is raised to 20 units on the day specified on the Registrar’s Quarterly Calendar. See http://www.reg.uci.edu/navigation/calendars.html

If you need permission to enroll in more than the allowed number of units, you may petition to do so here.

There is a new form that you should use instead of this one, you can find it at https://ps.uci.edu/node/2499