<p>From reading a couple of the articulation agreements with local (SF Bay Area) CC’s it seems that the one period where you can’t take courses is the summer between the end of high school and the beginning of freshman year. The agreements seem to specify courses taken <em>before high school graduation</em> (emphasis theirs) and those taken by USC students. The second category requires pre-approval, which you can’t get until you actually matriculate.</p>
<p>So I guess they give you the summer off ;).</p>