diff --git a/draft-ietf-sidrops-8210bis.xml b/draft-ietf-sidrops-8210bis.xml
index e1432a4..6b99f44 100644
--- a/draft-ietf-sidrops-8210bis.xml
+++ b/draft-ietf-sidrops-8210bis.xml
@@ -247,12 +247,14 @@
         on their caches and the Global RPKI.
       </t>
       <t>
-	If the router is fetching from multiple caches, then withdraws
-	of a particular VRP invalidating some prefix may take effect for
-	longer than announcements of that VRP.  This is because all
+	A VRP is effective if it is in the fetched set from any of the
+	currently preferred caches.  Therefore, if the router is
+	fetching from multiple equal preference caches, then withdraws
+	of a particular VRP invalidating some prefix may take effect
+	comparitively later than announcements of that VRP.  All in-use
 	caches must have withdrawn the VRP for the router to not have a
-	copy; but if any router has received an announcement then that
-	VRP is in effect.
+	copy; but if the router has received an announcement from any
+	cache then that VRP is in effect.
       </t>
       <t>
         Periodically, the router sends a Serial Query to the cache the