<p>I’m not sure if this completely answers your question, but here goes:</p>
<p>According to their website,
“Students may not receive credit for both an AP exam and a college course taken before high school graduation covering the same subject matter, nor for an AP and an IB exam covering the same subject matter.”
[USC</a> ARR : Articulation : Advanced Placement Exams](<a href=“http://www.usc.edu/dept/ARR/articulation/apexams.html]USC”>http://www.usc.edu/dept/ARR/articulation/apexams.html)</p>
<p>It sounds like you are able to receive credit for “a college course taken before high school graduation” (It just can’t be combined with an AP course to receive 4 more units) although I think the maximum number of units an incoming freshman can accumulate before actually starting is 32.</p>