Computer Science and Business Admin major

I am a senior in HS, applying to USC for fall 2018.

Is the Computer Science and Business Administration combined major only open to freshmen aka people applying right now, like myself?

I am asking because I’ve never given much thought to business, and I am applying to computer science majors at other schools, but this combined major is definitely appealing to me. I was originally going to put “Computer Engineering and Computer Science” as my first choice major, but if I cannot transfer into CS+Business once I’m attending, I’ll probably want to make CS+Business my first choice now.

Also, I want to apply within 24 hours hahaha (should have thought this through earlier, my bad). Please help! thanks