--- a/ttml2/spec/ttml2.xml	Wed Jul 16 22:17:35 2014 -0600
+++ b/ttml2/spec/ttml2.xml	Wed Jul 16 22:38:37 2014 -0600
@@ -4244,13 +4244,13 @@
 <p>A <att>ttp:version</att> attribute is considered to be significant only
 when specified on the <el>tt</el> element.</p>
 <note role="elaboration">
-<p>A <loc href="#terms-content-processor">content processor</loc> may use the
+<p>A <loc href="#terms-content-processor">content processor</loc> typically uses the
 declared version to perform a preliminary assessment of whether it is capable of
 processing a given <loc href="#terms-document-instance">document instance</loc>.
-However, it must not assume that the <loc href="#terms-document-instance">document instance</loc>
+However, it does not assume that the <loc href="#terms-document-instance">document instance</loc>
 actually uses or requires support for a <loc href="#terms-feature">feature</loc>
 not defined in prior versions. In other
-words, a <loc href="#terms-content-processor">content processor</loc> must not reject
+words, a <loc href="#terms-content-processor">content processor</loc> does not reject
 a <loc href="#terms-document-instance">document instance</loc> simply because it declares
 it was authored against a version of the <loc href="#terms-timed-text-markup-language">Timed Text Markup Language</loc>
 specification that was not yet published at the time the processor was implemented.</p>