diff --git a/index.html b/index.html
index e2d42cb5..9a386e00 100644
--- a/index.html
+++ b/index.html
@@ -2792,6 +2792,7 @@ <h4 id=el-hr>`hr`</h4>
     <tr>
       <th>Comments</th>
       <td>
+        <p>If an `hr` element is a descendant of a `select` element, user agents MAY expose the element with a role of `none`.</p>
       </td>
     </tr>
   </tbody>
@@ -16747,6 +16748,7 @@ <h3>Change Log</h3>
       <section>
         <h4>Substantive changes since moving to the <a href="https://www.w3.org/WAI/ARIA/">Accessible Rich Internet Applications Working Group</a> (03-Nov-2019)</h4>
         <ul>
+          <li>09-Oct-2023: Acknowledge use of `hr` element within `select` element. See <a href="https://github.com/w3c/html-aam/pull/504">GitHub PR 504</a>.</li>
           <li>03-Oct-2023: Update image mappings to reference the primary synonym roles (`image` and `none`). See <a href="https://github.com/w3c/html-aam/pull/498">GitHub PR 498</a>.</li>
           <li>03-Oct-2023: Clarify when to expose required field as invalid. See <a href="https://github.com/w3c/html-aam/pull/429">GitHub PR 429</a>.</li>
           <li>06-Jun-2023: Add computed roles for all HTML elements. See <a href="https://github.com/w3c/html-aam/pull/465">GitHub PR 465</a>.</li>