<p>Take directly from [Early</a> Action FAQ | Application to Yale College | Freshmen | Office of Undergraduate Admissions](<a href=“http://www.yale.edu/admit/freshmen/application/eafaq.html]Early”>http://www.yale.edu/admit/freshmen/application/eafaq.html) :</p>
<p>"Q. I am applying to Yale under the Single Choice Early Action program. Can you explain the rules about applying to other colleges under their various early notification programs? </p>
<p>A. If you are an applicant to Yale under the Single Choice Early Action program, you may also apply to another institution’s early admissions program under the following conditions:</p>
<ol>
<li><p>You may apply to a public institution in your home state, even if you will receive an admissions decision prior to January 1. (That decision must be non-binding, meaning that you have until May 1 to respond.)</p></li>
<li><p>You may apply to a public university’s “rolling” admission program if the program is non-binding.</p></li>
<li><p>You may apply to a college with an early deadline for scholarship awards, but only if the notification of admission occurs after January 1.</p></li>
<li><p>Finally, you may apply to another college’s “Round 2 Early Decision” program, but only if notification is after January 1. If you are admitted through another college’s “Round 2 Early Decision” program, you must withdraw your application from Yale."</p></li>
</ol>
<p>Hope that helps.</p>