diff --git a/spec.bs b/spec.bs
index 2149413..5c28ec5 100644
--- a/spec.bs
+++ b/spec.bs
@@ -108,6 +108,7 @@ spec: html; urlPrefix: https://html.spec.whatwg.org/multipage/
       text: dom interface; url: concept-element-dom
       text: accessibility considerations; url: concept-element-accessibility-considerations
       text: represents; url: represents
+      text: event handler content attributes which may be specified on any HTML element; url: global-attributes:event-handler-content-attributes
     urlPrefix: common-dom-interfaces.html
       text: reflect; url: reflect
     urlPrefix: embedder-content-other.html
@@ -357,6 +358,14 @@ dl, dd {
   background: white;
   border: solid #D50606;
 }
+
+/* Table styling definitions from https://resources.whatwg.org/standard.css */
+table { border-collapse: collapse; border-style: hidden hidden none hidden; margin: 1.25em 0; }
+table thead, table tbody { border-bottom: solid; }
+table tbody th { text-align: left; }
+table tbody th:first-child { border-left: solid; }
+table td, table th { border-left: solid; border-right: solid; border-bottom: solid thin; vertical-align: top; padding: 0.2em; }
+
 </style>
 
 <script src="https://resources.whatwg.org/file-issue.js" async></script>
@@ -1633,6 +1642,7 @@ Several APIs specific to fenced frames are defined on the {{Fence}} interface.
       undefined reportEvent(optional ReportEventType event = {});
       undefined setReportEventDataForAutomaticBeacons(optional FenceEvent event = {});
       sequence&lt;FencedFrameConfig&gt; getNestedConfigs();
+      undefined notifyEvent(Event event);
   };
 </pre>
 
@@ -1819,6 +1829,47 @@ Several APIs specific to fenced frames are defined on the {{Fence}} interface.
   </wpt>
 </div>
 
+<div algorithm>
+  The <dfn method for=Fence>notifyEvent(|event|)</dfn> method steps are:
+
+  1. If [=this=]'s {{Document}} is not [=Document/fully active=], then return.
+
+  1. Let |navigable| be [=this=]'s [=relevant global object=]'s [=Window/navigable=].
+  
+  1. If any of the following conditions are met, then throw a {{SecurityError}} {{DOMException}}:
+
+      * |navigable| is not a [=fenced navigable container/fenced navigable=];
+  
+      * |event|'s {{Event/isTrusted}} is false;
+  
+      * |event|'s [=Event/dispatch flag=] is unset;
+
+      * |event|'s {{Event/type}} is not "<code>click</code>"
+  
+  1. If [=this=]'s [=relevant global object=] does not have [=transient activation=], then return.
+
+  1. [=Consume user activation=] for [=this=]'s [=relevant global object=].
+
+  1. Let |parentNavigable| be |navigable|'s [=navigable/unfenced parent=].
+
+  1. [=Queue a global task=] on the [=DOM manipulation task source=] given |parentNavigable|'s     
+     [=navigable/active window=] to run these steps:
+  
+     1. Perform the [=activation notification=] steps.
+
+     1. [=Fire an event=] named "<code>[=fencedtreeclick=]</code>" at |navigable|'s 
+        [=fenced navigable container=]. Initialize the event's {{Event/bubbles}} and {{Event/cancelable}} attributes to `true`. When running the 
+        <a href="https://dom.spec.whatwg.org/#inner-event-creation-steps">inner event creation steps</a>, set the <var ignore=''>time</var> to an [=implementation-defined=] value that is consistent across all invocations of this method.
+
+  <wpt>
+    /fenced-frame/notify-event-iframe.https.html
+    /fenced-frame/notify-event-invalid.https.html
+    /fenced-frame/notify-event-nested-fenced-frames.https.html
+    /fenced-frame/notify-event-success.https.html
+    /fenced-frame/notify-event-transient-user-activation.https.html
+  </wpt>
+</div>
+
 <h3 id=new-request-destination>New [=request=] [=request/destination=]</h3>
 
 The processing model of a <{fencedframe}>'s navigation request deviates from that of the normal
@@ -2951,6 +3002,67 @@ modified such that the first step of the algorithm that runs when a user-agent c
 [=traversable navigable=]'s [=system visibility state=] calls the [=Document/inclusive descendant
 navigables=] algorithm with [=inclusive-dn-unfenced|unfenced=] set to true.
 
+<h3 id=events>Events</h3>
+
+<h4 id=onfencedtreeclick-header><code>[=onfencedtreeclick=]</code> event handler</h4>
+The table in the <a href="https://html.spec.whatwg.org/multipage/webappapis.html#event-handlers-on-elements,-document-objects,-and-window-objects">
+event handlers on elements, Document objects, and Window objects</a> section of [[HTML]] is modified to include a new row.
+
+<table>
+  <thead>
+    <tr>
+      <th>[=Event handler=]</th> 
+      <th>[=Event handler event type=]</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><dfn><code>onfencedtreeclick</code></dfn></td>
+      <td><code>[=fencedtreeclick=]</code></td>
+    </tr>
+  </tbody>
+</table>
+
+The {{GlobalEventHandlers}} interface is modified as follows:
+
+<pre class=idl>
+  partial interface mixin GlobalEventHandlers {
+    attribute EventHandler onfencedtreeclick;
+  };
+</pre>
+
+Additionally, the list of [=event handler content attributes which may be specified on any HTML element=] 
+in [[HTML]] is modified to include a new row:
+
+* [=onfencedtreeclick=]
+
+<h4 id=fencedtreeclick-header><code>[=fencedtreeclick=]</code> event type</h4>
+The <a href="https://html.spec.whatwg.org/C#events-2">Events</a> table in the
+<a href="https://html.spec.whatwg.org/multipage/indices.html">Index</a> section of [[HTML]] is
+modified to include a new row.
+
+<table>
+  <thead>
+    <tr>
+      <th>Event</th> 
+      <th>Interface</th> 
+      <th>Interesting targets</th> 
+      <th>Description</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><dfn><code>fencedtreeclick</code></dfn></td> 
+      <td>{{Event}}</td> 
+      <td>Elements</td>
+      <td>
+        Fired at a <{fencedframe}> element asynchronously after its
+        [=fenced navigable container/fenced navigable=]'s {{Document}} calls {{Fence/notifyEvent()}}
+      </td>
+    </tr>
+  </tbody>
+</table>
+
 <h2 id="interaction-with-other-specs">Interactions with other specifications</h2>
 
 Due to the necessarily cross-cutting nature of the <{fencedframe}> element and its interactions with