diff --git a/common/dtd/ldmlICU.dtd b/common/dtd/ldmlICU.dtd
index 4bb39cbf9b8..e8abdedcbab 100644
--- a/common/dtd/ldmlICU.dtd
+++ b/common/dtd/ldmlICU.dtd
@@ -49,6 +49,7 @@ NOTE: Unlike the other DTDs, this file is manually maintained.
 <!ELEMENT icu:extensions (alias | (icu:extension*)) >
 
 <!ELEMENT icu:extension ( #PCDATA ) >
+    <!--@ORDERED-->
 
 <!ELEMENT icu:lstm (alias | (icu:lstmdata*)) >
 
diff --git a/tools/cldr-code/src/main/java/org/unicode/cldr/api/CldrPaths.java b/tools/cldr-code/src/main/java/org/unicode/cldr/api/CldrPaths.java
index 2928c1662f0..42c8a175f90 100644
--- a/tools/cldr-code/src/main/java/org/unicode/cldr/api/CldrPaths.java
+++ b/tools/cldr-code/src/main/java/org/unicode/cldr/api/CldrPaths.java
@@ -205,8 +205,9 @@ static boolean isLeafPath(CldrPath path) {
      * sort index).
      */
     static boolean isOrdered(CldrDataType dtdType, String elementName) {
-        // Elements with namespaces unknown the the DTD are never ordered.
-        if (elementName.indexOf(':') != -1) {
+        // Elements with namespaces unknown to the DTD are never ordered
+        // (but it knows about icu: elements).
+        if (elementName.indexOf(':') != -1 && !elementName.startsWith("icu:")) {
             return false;
         }
         // Returns empty set if DTD unknown, but it might also be the case that a valid DTD has no
diff --git a/tools/cldr-code/src/main/java/org/unicode/cldr/util/DtdData.java b/tools/cldr-code/src/main/java/org/unicode/cldr/util/DtdData.java
index cf51ba44890..e8ff6f4988e 100644
--- a/tools/cldr-code/src/main/java/org/unicode/cldr/util/DtdData.java
+++ b/tools/cldr-code/src/main/java/org/unicode/cldr/util/DtdData.java
@@ -1202,9 +1202,8 @@ public boolean isDeprecated(String elementName, String attributeName, String att
     public boolean isOrdered(String elementName) {
         Element element = nameToElement.get(elementName);
         if (element == null) {
-            if (elementName.startsWith("icu:")) {
-                return false;
-            }
+            // No longer need to always return false for icu: elements per CLDR-8614,
+            // nameToElement should now know about them (see getInstance above).
             throw new IllegalByDtdException(elementName, null, null);
         }
         return element.isOrderedElement;