An impacted major is one that is limiting enrollment.
If you choose an impacted major on your application, you must also select an alternate major that is not impacted. These choices will not affect your overall admission to UC San Diego, and if admitted to the university, you could be admitted into either major.Freshmen – Fall 2013
Continuing students – Fall 2015
Transfer students – Fall 2015
Note: An impacted major is not the same as a major requiring pre-major status.