--- a/ttml10-sdp-us/Overview.html	Thu Oct 18 13:59:16 2012 +0700
+++ b/ttml10-sdp-us/Overview.html	Thu Oct 18 14:13:50 2012 +0700
@@ -409,7 +409,7 @@
 <span style="color: blue;">&lt;</span><span style="color: #a31515;">span</span><span style="color: blue;"> </span><span style="color: red;">style</span><span style="color: blue;">=</span>"<span style="color: blue;">s1</span>"<span style="color: blue;">&gt;</span>C<span style="color: blue;">&lt;/</span><span style="color: #a31515;">span</span><span style="color: blue;">&gt;</span>
 </pre>
 <p data-transform='constraint'>A document MUST reference all styles using a style attribute to a style element.</p>
-<p data-transform='constraint'>A document MUST have all elements are in order of time. That is, in a par context, an element MUST NOT lexically precede another element with an earlier start time.</p>
+<p data-transform='constraint'>A document MUST have all elements are in order of time. That is, in a par context, an timed element MUST NOT lexically precede another timed element with an earlier start time.</p>
 </section>
 <section id='Constrained_Features'>
 <h2>Constrained Features</h2>