<p>To add to the already boisterous choir of voices in support of reporting the change, you need to fire off an email right away. They probably won’t rescind you, and if the worst case scenario comes true at least you’ll have time to send in your SIR to another UC or attend another college. If you yank them around by not spilling the beans and then they see your transcript and rescind you in mid-summer you’ll have no other options.</p>
<p>When I sent in my course update to UCLA (Dropped and added some non-major classes for spring quarter) I got a reply saying the changes were noted in thirty minutes, don’t sweat it.</p>