--- a/ttml1/spec/ttml1-changes.html	Mon Aug 26 19:43:29 2013 -0600
+++ b/ttml1/spec/ttml1-changes.html	Tue Aug 27 11:33:50 2013 -0600
@@ -100,6 +100,10 @@
   container region and that clipping behavior on the root container region is not
   specified.
 
+* In 9.3.3, add note clarifying that a negative offset may need to be used with
+  top, left, bottom, or right properties of fo:block-container when a region extends
+  outside of its containing block.
+
 * In 11.1.1, correct note to show derivation from SVG 1.1, not SMIL 2.1.
 
 * In 12.1.7, clarify that agent attribute on ttm:actor must reference a "significant"

--- a/ttml1/spec/ttml1.xml	Mon Aug 26 19:43:29 2013 -0600
+++ b/ttml1/spec/ttml1.xml	Tue Aug 27 11:33:50 2013 -0600
@@ -7565,6 +7565,12 @@
 element, would correspond to the <emph>Root Container Region</emph> defined
 above in <specref ref="definitions"/>.</p>
 </note>
+<note role="clarification">
+<p>When mapping a <el>region</el> element to <el>fo:block-container</el>, it may
+be necessary to use a negative offset as a value for one or more of the
+<att>top</att>, <att>left</att>, <att>bottom</att>, and <att>right</att>
+XSL-FO properties in case the region extends outside of its containing block.</p>
+</note>
 <note>
 <p>Due to the possible presence of TTML style properties or style property values
 in a given <emph>Document Instance</emph> for which there is no <bibref ref="xsl11"/> counterpart,

--- a/ttml2/spec/ttml2.xml	Mon Aug 26 19:43:29 2013 -0600
+++ b/ttml2/spec/ttml2.xml	Tue Aug 27 11:33:50 2013 -0600
@@ -7945,6 +7945,12 @@
 element, would correspond to the <emph>Root Container Region</emph> defined
 above in <specref ref="definitions"/>.</p>
 </note>
+<note role="clarification">
+<p>When mapping a <el>region</el> element to <el>fo:block-container</el>, it may
+be necessary to use a negative offset as a value for one or more of the
+<att>top</att>, <att>left</att>, <att>bottom</att>, and <att>right</att>
+XSL-FO properties in case the region extends outside of its containing block.</p>
+</note>
 <note>
 <p>Due to the possible presence of TTML style properties or style property values
 in a given <emph>Document Instance</emph> for which there is no <bibref ref="xsl11"/> counterpart,