diff --git a/dom.bs b/dom.bs
index 02e664d7e..852ff542b 100644
--- a/dom.bs
+++ b/dom.bs
@@ -1065,6 +1065,15 @@ seen from the definition above, an <a>event listener</a> is a more broad concept
 method, when invoked, must run these steps:
 
 <ol>
+ <li>
+  <p>If the global object is a {{ServiceWorkerGlobalScope}} object and its associated
+  <a>service worker</a>'s <a>has ever been evaluated flag</a> is set, <a>throw</a> an
+  {{InvalidStateError}} exception. [[!SW]]
+
+  <p class="note no-backref">To optimize the service worker execution behavior, the user agent
+  throws an {{InvalidStateError}} exception when the method is called after the very first
+  evaluation of the service worker script.
+
  <li><p>If <var>callback</var> is null, terminate these steps.
 
  <li><p>Let <var>capture</var> and <var>passive</var> be the result of <a>flattening</a>