diff --git a/index.html b/index.html
index facd8dcce..9eb61521d 100644
--- a/index.html
+++ b/index.html
@@ -8494,7 +8494,7 @@ <h5>Presentational Role Inheritance</h5>
               (horizontal or vertical) it controls. Its orientation represents the orientation of the scrollbar and the scrolling effect on the viewing area controlled by the scrollbar. It is
               typically possible to add to or subtract from the current value by using directional keys such as arrow keys.
             </p>
-            <p>Authors MUST set the <pref>aria-controls</pref> attribute on the scrollbar element to reference the scrollable area it controls.</p>
+            <p>Authors MAY set the <pref>aria-controls</pref> attribute on the scrollbar element to reference the scrollable area it controls.</p>
             <p>
               Authors MAY set <pref>aria-valuemin</pref> and <pref>aria-valuemax</pref> to indicate the minimum and maximum thumb position. Otherwise, their implicit values follow the same rules as
               <code>&lt;input type="[^input/type/range^]"&gt;</code> in HTML:
@@ -8563,7 +8563,6 @@ <h5>Presentational Role Inheritance</h5>
                 <th class="role-required-properties-head">Required States and Properties:</th>
                 <td class="role-required-properties">
                   <ul>
-                    <li><pref>aria-controls</pref></li>
                     <li><pref>aria-valuenow</pref></li>
                   </ul>
                 </td>
@@ -16654,11 +16653,6 @@ <h3>States and Properties</h3>
               <td><sref>aria-checked</sref></td>
               <td><code>false</code></td>
             </tr>
-            <tr>
-              <td><rref>scrollbar</rref></td>
-              <td><pref>aria-controls</pref></td>
-              <td>no mapping</td>
-            </tr>
             <tr>
               <td><rref>scrollbar</rref></td>
               <td><pref>aria-valuenow</pref></td>