diff --git a/tools/cldr-apps/js/src/esm/cldrAnnounce.mjs b/tools/cldr-apps/js/src/esm/cldrAnnounce.mjs
index d9515685457..056611e93aa 100644
--- a/tools/cldr-apps/js/src/esm/cldrAnnounce.mjs
+++ b/tools/cldr-apps/js/src/esm/cldrAnnounce.mjs
@@ -124,6 +124,9 @@ function canChooseAllOrgs() {
   return cldrStatus.getPermissions()?.userIsTC || false;
 }
 
+/**
+ * @param localeState 'ddl' or 'all' or 'choose'
+ */
 async function compose(formState, viewCallbackComposeResult) {
   resetSchedule();
   const init = cldrAjax.makePostData(formState);
diff --git a/tools/cldr-apps/js/src/views/AnnounceForm.vue b/tools/cldr-apps/js/src/views/AnnounceForm.vue
index e129121a27e..c18dd5ab5ef 100644
--- a/tools/cldr-apps/js/src/views/AnnounceForm.vue
+++ b/tools/cldr-apps/js/src/views/AnnounceForm.vue
@@ -43,11 +43,17 @@
     </a-form-item>
 
     <a-form-item class="formItems" label="Locales" name="locs">
-      <a-input
-        v-model:value="formState.locs"
-        placeholder="Optional list of locales (like: aa fr zh) (fr implies fr_CA/etc.) (empty for all locales, '!' for non-TC)"
-        @blur="validateLocales()"
-      />
+      <a-radio-group v-model:value="formState.localeType">
+        <a-radio value="all">All</a-radio>
+        <a-radio value="ddl">All DDL (non-TC) Locales</a-radio>
+        <a-radio value="choose">Choose…</a-radio>
+        <a-input
+          v-if="formState.localeType === 'choose'"
+          v-model:value="formState.locs"
+          placeholder="Required: list of locales, such as: “aa fr zh”. (fr implies fr_CA/etc.)"
+          @blur="validateLocales()"
+        />
+      </a-radio-group>
     </a-form-item>
     <a-form-item
       class="formItems"
@@ -76,7 +82,11 @@
       <a-form-item>
         <a-button html-type="cancel" @click="onCancel">Cancel</a-button>
         &nbsp;
-        <a-button type="primary" html-type="submit" @click="onPost"
+        <a-button
+          type="primary"
+          :disabled="!okToPost()"
+          html-type="submit"
+          @click="onPost"
           >Post</a-button
         >
       </a-form-item>
@@ -86,7 +96,7 @@
 
 <script>
 import * as cldrAnnounce from "../esm/cldrAnnounce.mjs";
-import { defineComponent, reactive } from "vue";
+import { defineComponent, reactive, ref } from "vue";
 
 export default defineComponent({
   props: ["formHasAllOrgs", "postOrCancel"],
@@ -98,6 +108,7 @@ export default defineComponent({
       locs: "",
       orgs: "Mine",
       subject: "",
+      localeType: "all",
     });
 
     const onFinish = (values) => {
@@ -123,11 +134,19 @@ export default defineComponent({
     onPost() {
       // onFinish or onFinishFailed should be called for validation.
       // Double-check that subject and body aren't empty.
-      if (this.formState.subject && this.formState.body) {
+      if (this.okToPost()) {
         this.postOrCancel(this.formState);
       }
     },
 
+    /** @returns true only when the post button should be enabled */
+    okToPost() {
+      if (!this.formState.subject || !this.formState.body) return false;
+      if (this.formState.localeType != "choose") return true;
+      if (this.formState.locs != "") return true;
+      return false;
+    },
+
     whatWillHappen() {
       return (
         "You are about to post an announcement to " +
@@ -171,14 +190,17 @@ export default defineComponent({
     },
 
     describeLocs() {
-      if (this.formState.locs === "!") return "Non-TC locales";
-      return this.formState.locs === "" || this.formState.locs === "*"
-        ? "all locales"
-        : "the following locale(s): " + this.formState.locs;
+      if (this.formState.localeType === "ddl") return "DDL (Non-TC) locales";
+      if (
+        this.formState.localeType === "all" ||
+        this.formState.locs === "" ||
+        this.formState.locs === "*"
+      )
+        return "all locales";
+      return "the following locale(s): " + this.formState.locs;
     },
 
     validateLocales() {
-      if (this.formState.locs === "!") return;
       cldrAnnounce.combineAndValidateLocales(
         this.formState.locs,
         this.updateValidatedLocales
diff --git a/tools/cldr-apps/src/main/java/org/unicode/cldr/web/api/Announcements.java b/tools/cldr-apps/src/main/java/org/unicode/cldr/web/api/Announcements.java
index 6d2af1b6713..a761da1d9f4 100644
--- a/tools/cldr-apps/src/main/java/org/unicode/cldr/web/api/Announcements.java
+++ b/tools/cldr-apps/src/main/java/org/unicode/cldr/web/api/Announcements.java
@@ -11,8 +11,10 @@
 import org.eclipse.microprofile.openapi.annotations.responses.APIResponse;
 import org.eclipse.microprofile.openapi.annotations.responses.APIResponses;
 import org.eclipse.microprofile.openapi.annotations.tags.Tag;
+import org.unicode.cldr.test.SubmissionLocales;
 import org.unicode.cldr.util.LocaleNormalizer;
 import org.unicode.cldr.util.LocaleSet;
+import org.unicode.cldr.util.Organization;
 import org.unicode.cldr.web.*;
 
 @ApplicationScoped
@@ -25,10 +27,18 @@ public class Announcements {
     public static final String AUDIENCE_EVERYONE = "Everyone";
 
     public static final String ORGS_MINE = "Mine";
+    /** all TC orgs, as defined by {@link Organization#isTCOrg()} */
     public static final String ORGS_TC = "TC";
+    /** excluding TC orgs, as defined by {@link Organization#isTCOrg()} */
     public static final String ORGS_NON_TC = "NonTC";
+    /** All organizations */
     public static final String ORGS_ALL = "All";
 
+    /**
+     * Special value for ddl (non tc) locales. This special value for locales sends to all locales,
+     * but only those which are currently not defined as TC Locales by the SubmissionLocales class.
+     * {@link SubmissionLocales#isTcLocale(org.unicode.cldr.util.CLDRLocale)}
+     */
     public static final String LOCS_NON_TC = "!";
 
     private static final Set<String> validAudiences =
@@ -245,6 +255,9 @@ public SubmissionRequest() {
         @Schema(description = "locales")
         public String locs = null;
 
+        @Schema(description = "localeType: one of 'all', 'ddl', or 'choose'", example = "choose")
+        public String localeType = null;
+
         @Schema(description = "orgs")
         public String orgs = null;
 
@@ -253,7 +266,14 @@ public boolean isValid() {
         }
 
         public void normalize() {
-            if (locs != null && !locs.equals(LOCS_NON_TC)) {
+            if ("ddl".equals(localeType)) {
+                // special value for ddl (non-tc) locales.
+                // "ddl" means non-tc locales.
+                locs = LOCS_NON_TC;
+            } else if ("all".equals(localeType)) {
+                // all locales
+                locs = null;
+            } else if (locs != null) {
                 String normalized = LocaleNormalizer.normalizeQuietly(locs);
                 LocaleSet locSet = LocaleNormalizer.setFromStringQuietly(normalized, null);
                 LocaleSet langSet = locSet.combineRegionalVariants();