<p>In the list of California schools in WUE, it looks like the non-impacted or least-impacted CSUs, which presumably have excess capacity that is not filled with California residents or non-residents paying normal non-resident price.</p>
<p>It would not be surprising if schools in other states decided to participate or not in WUE on this basis. The existence of restrictions by major indicates that some schools may allow WUE tuition only for non-impacted majors.</p>