diff --git a/source b/source
index 2b886aa2a6b..8e27d9ca023 100644
--- a/source
+++ b/source
@@ -53188,6 +53188,9 @@ interface <dfn interface>HTMLLegendElement</dfn> : <span>HTMLElement</span> {
 
   <h4 split-filename="form-control-infrastructure">Form control infrastructure</h4>
 
+  <p class="note">In this section <span data-x="concept-form">form</span>
+  refers to either a <code>form</code> or a <code>search</code> element.</p>
+
   <h5>A form control's value</h5>
 
   <p>Most form controls have a <dfn data-x="concept-fe-value">value</dfn> and a <dfn
@@ -53431,6 +53434,9 @@ interface <dfn interface>HTMLLegendElement</dfn> : <span>HTMLElement</span> {
 
   <h4>Attributes common to form controls</h4>
 
+  <p class="note">In this section <span data-x="concept-form">form</span>
+  refers to either a <code>form</code> or a <code>search</code> element.</p>
+
   <h5>Naming form controls: the <code data-x="attr-fe-name">name</code> attribute</h5>
 
   <p>The <dfn element-attr for="button,fieldset,input,output,select,textarea"><code
@@ -56099,6 +56105,9 @@ control.setSelectionRange(oldStart + prefix.length, oldEnd + prefix.length, oldD
 
   <div w-nodev>
 
+  <p class="note">In this section <span data-x="concept-form">form</span>
+  refers to either a <code>form</code> or a <code>search</code> element.</p>
+
   <h5>Definitions</h5>
 
   <p>A <span data-x="category-submit">submittable element</span> is a <dfn>candidate for constraint
@@ -56687,6 +56696,9 @@ interface <dfn interface>ValidityState</dfn> {
 
   <div w-nodev>
 
+  <p class="note">In this section <span data-x="concept-form">form</span>
+  refers to either a <code>form</code> or a <code>search</code> element.</p>
+
   <h5>Introduction</h5>
 
   </div>
@@ -56736,6 +56748,9 @@ fur
 
   <h5>Implicit submission</h5>
 
+  <p class="note">In this section <span data-x="concept-form">form</span>
+  refers to either a <code>form</code> or a <code>search</code> element.</p>
+
   <p>A <span data-x="concept-form">form</span>'s <dfn>default button</dfn> is the first <span
   data-x="concept-submit-button">submit button</span> in <span>tree order</span> whose <span>form
   owner</span> is that <span data-x="concept-form">form</span>.</p>
@@ -56783,6 +56798,9 @@ fur
 
   <h5>Form submission algorithm</h5>
 
+  <p class="note">In this section <span data-x="concept-form">form</span>
+  refers to either a <code>form</code> or a <code>search</code> element.</p>
+
   <p>Each <span data-x="concept-form">form</span> has a <dfn>constructing entry list</dfn>
   boolean, initially false.</p>
 
@@ -57428,6 +57446,9 @@ fur
 
   <h5>Selecting a form submission encoding</h5>
 
+  <p class="note">In this section <span data-x="concept-form">form</span>
+  refers to either a <code>form</code> or a <code>search</code> element.</p>
+
   <p>If the user agent is to <dfn data-x="picking an encoding for the form">pick an encoding for a
   form</dfn>, it must run the following steps:</p>
 
@@ -57681,6 +57702,9 @@ dictionary <dfn dictionary>FormDataEventInit</dfn> : <span>EventInit</span> {
 
   <h4>Resetting a form</h4>
 
+  <p class="note">In this section <span data-x="concept-form">form</span>
+  refers to either a <code>form</code> or a <code>search</code> element.</p>
+
   <p>When a <span data-x="concept-form">form</span> <var>form</var> is <dfn
   data-x="concept-form-reset">reset</dfn>, run these steps:</p>
 
@@ -67740,6 +67764,9 @@ document.body.appendChild(flagIcon)</code></pre>
 
   <!-- NON-NORMATIVE SECTION -->
 
+  <p class="note">In this section <span data-x="concept-form">form</span>
+  refers to either a <code>form</code> or a <code>search</code> element.</p>
+
   <p>Adding a static <code data-x="">formAssociated</code> property, with a true value, makes an
   <span>autonomous custom element</span> a <span>form-associated custom element</span>. The
   <code>ElementInternals</code> interface helps you to implement functions and properties common
@@ -69503,6 +69530,9 @@ dictionary <dfn dictionary>ValidityStateFlags</dfn> {
 
   <h5>Form-associated custom elements</h5>
 
+  <p class="note">In this section <span data-x="concept-form">form</span>
+  refers to either a <code>form</code> or a <code>search</code> element.</p>
+
   <dl class="domintro">
    <dt><code data-x=""><var>internals</var>.<span data-x="dom-ElementInternals-setFormValue">setFormValue</span>(<var>value</var>)</code></dt>
    <dd>