Do you HAVE TO send a SAT Subject Score to UCs?

Colleges and Universities A-Z University of California - GENERAL
1

I took a USH SAT Subject Test and got a 580… which is really low. It would obviously look really bad. Am I required to score send it to UCs?

2

http://admission.universityofcalifornia.edu/freshman/requirements/examination-requirement/SAT-subject-tests/index.html