Too late to change major at uci?

<p>So pretty much I wanna change my major from chem to pharm sci, and I tried to tell my admissions counselor, but there was a message saying that at this point change in major is based on academic units not admission status. What does this mean? Can I change my major? I'm attending my physical science advising session on June 21, do I just tell them I plan on switching my major or...? Please help >.<</p>