diff --git a/css-scroll-anchoring-1/Overview.bs b/css-scroll-anchoring-1/Overview.bs
index 008f7a81c1d..b9f8fda8702 100644
--- a/css-scroll-anchoring-1/Overview.bs
+++ b/css-scroll-anchoring-1/Overview.bs
@@ -18,7 +18,9 @@ Abstract: This spec also proposes an API for web developers to opt-out of this b
 </pre>
 
 <pre class=link-defaults>
-spec:css22;
+spec:css-box-3; type:dfn; text:content area
+spec:cssom-view-1; type:dfn; text:scrolling area
+spec:css2;
 	type:property;
 		text:max-height
 		text:min-height
@@ -78,7 +80,9 @@ In some cases, a scrolling box may not select any anchor node.
 	1. If |S| is associated with an element
 		whose computed value of the 'overflow-anchor' property is ''overflow-anchor/none'',
 		then do not select an anchor node for |S|.
-	2. Otherwise, for each DOM child |N| of the element or document associated with |S|,
+	2. If |S| is not scrolled away from the origin of its <a>scrolling area</a> in its
+		<a>block flow direction</a>, then do not select an anchor node for |S|.
+	3. Otherwise, for each DOM child |N| of the element or document associated with |S|,
 		perform the <a>candidate examination algorithm</a> for |N| in |S|,
 		and terminate if it selects an anchor node.
 </div>
@@ -110,17 +114,13 @@ In some cases, a scrolling box may not select any anchor node.
 		content to shift without triggering any scroll anchoring adjustment.
 </div>
 
-Conceptually, a new anchor node is computed for every scrolling box
-whenever the scroll position of any scrolling box changes.
-(As a performance optimization,
-the implementation may wait until the anchor node is needed before computing it.)
-
 <div algorithm>
 	A DOM node |N| is an <dfn>excluded subtree</dfn>
 	if it is an element and any of the following conditions holds:
 
 	* |N|’s computed value of the 'display' property is ''display/none''.
 	* |N|’s computed value of the 'position' property is ''position/fixed''.
+	* |N|’s computed value of the 'position' property is ''position/sticky''.
 	* |N|’s computed value of the 'position' property is ''position/absolute''
 		and |N|’s <a>containing block</a> is an ancestor of the scrolling box.
 	* |N|’s computed value of the 'overflow-anchor' property is ''overflow-anchor/none''.
@@ -147,6 +147,18 @@ the implementation may wait until the anchor node is needed before computing it.
 	or the bounding rect of its <a>line boxes</a> if |N| is a text node.
 </div>
 
+<h4 id='anchor-node-invalidation'>
+Invalidation</h3>
+
+An anchor node is considered valid for a <a>scrolling box</a> until any of the following occur:
+	* The scroll position of the <a>scrolling box</a> changes (excluding adjustments originating from scroll anchoring).
+	* A <a>suppression trigger</a> suppresses a scroll adjustment.
+	* The <a>anchor node</a> is removed from the DOM.
+
+Once an anchor node has become invalid, the <a>anchor node selection algorithm</a> must be run again to compute the anchor node
+
+As a performance optimization, implementations may wait until the <a>anchor node</a> is needed before computing it.
+
 <h3 id="scroll-adjustment">
 Scroll Adjustment</h3>