diff --git a/index.html b/index.html
index e23b7255b..6f677bc9c 100644
--- a/index.html
+++ b/index.html
@@ -10213,7 +10213,13 @@ <h5>Presentational Role Inheritance</h5>
               for details on implementing a tab set design pattern.
             </p>
             <p>Authors MUST ensure [=elements=] with <a>role</a> <rref>tab</rref> are <a>accessibility children</a> of an element with the role <rref>tablist</rref>.</p>
-            <p>Authors MUST ensure that if a <code>tab</code> is active, a corresponding <code>tabpanel</code> that represents the active <code>tab</code> is rendered.</p>
+            <!-- keep following paragraphs in sync with counterpart in #tabpanel -->
+			<p>Authors MUST ensure that if a <code>tab</code> is active, a corresponding <code>tabpanel</code> that represents the active <code>tab</code> is rendered.</p>  
+            <p>
+              Authors SHOULD associate a <code>tabpanel</code> <a>element</a> with its <rref>tab</rref>, by using the <pref>aria-controls</pref> attribute on the tab to reference the tab panel, and/or
+              by using the <pref>aria-labelledby</pref> attribute on the tab panel to reference the tab.
+            </p>
+            <!-- /end sync with counterpart in #tabpanel -->
             <p>Authors SHOULD ensure the <rref>tabpanel</rref> associated with the currently active tab is <a>perceivable</a> to the user.</p>
             <!-- keep following para synced with its counterpart in #tablist -->
             <p>
@@ -10547,10 +10553,13 @@ <h5>Presentational Role Inheritance</h5>
           <rdef>tabpanel</rdef>
           <div class="role-description">
             <p>A container for the resources associated with a <rref>tab</rref>, where each <rref>tab</rref> is contained in a <rref>tablist</rref>.</p>
+			<!-- keep following paragraphs in sync with counterpart in #tab -->
+			<p>Authors MUST ensure that if a <code>tab</code> is active, a corresponding <code>tabpanel</code> that represents the active <code>tab</code> is rendered.</p>  
             <p>
               Authors SHOULD associate a <code>tabpanel</code> <a>element</a> with its <rref>tab</rref>, by using the <pref>aria-controls</pref> attribute on the tab to reference the tab panel, and/or
               by using the <pref>aria-labelledby</pref> attribute on the tab panel to reference the tab.
             </p>
+            <!-- /end sync with counterpart in #tab -->
             <!-- keep following para synced with its counterpart in #tablist -->
             <p>
               <rref>tablist</rref> elements are typically placed near, and usually preceding, a series of <rref>tabpanel</rref> elements. See the