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 2a49e0a0da8..c18dd5ab5ef 100644
--- a/tools/cldr-apps/js/src/views/AnnounceForm.vue
+++ b/tools/cldr-apps/js/src/views/AnnounceForm.vue
@@ -16,6 +16,9 @@
       <a-radio-group v-model:value="formState.orgs">
         <a-radio value="Mine" title="Only your own organization">Mine</a-radio>
         <a-radio value="TC" title="All TC organizations">TC Orgs</a-radio>
+        <a-radio value="NonTC" title="Non-TC organizations"
+          >Non-TC Orgs</a-radio
+        >
         <a-radio value="All" title="All organizations">All</a-radio>
       </a-radio-group>
     </a-form-item>
@@ -40,11 +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)"
-        @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"
@@ -73,7 +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>
@@ -83,7 +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"],
@@ -95,6 +108,7 @@ export default defineComponent({
       locs: "",
       orgs: "Mine",
       subject: "",
+      localeType: "all",
     });
 
     const onFinish = (values) => {
@@ -120,11 +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 " +
@@ -158,6 +180,8 @@ export default defineComponent({
           return "all organizations";
         case "TC":
           return "TC organizations";
+        case "NonTC":
+          return "Non-TC organizations";
         case "Mine":
           return "your organization only";
         default:
@@ -166,9 +190,14 @@ export default defineComponent({
     },
 
     describeLocs() {
-      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() {
diff --git a/tools/cldr-apps/js/src/views/AnnouncePost.vue b/tools/cldr-apps/js/src/views/AnnouncePost.vue
index 4f02d270ced..bffb6430f55 100644
--- a/tools/cldr-apps/js/src/views/AnnouncePost.vue
+++ b/tools/cldr-apps/js/src/views/AnnouncePost.vue
@@ -12,9 +12,7 @@
       <section class="announcementToFrom">
         To: {{ announcement.audience }} •
         {{ "Organization(s): " + announcement.orgs }} •
-        {{
-          announcement.locs ? "Locale(s): " + announcement.locs : "All locales"
-        }}
+        {{ localeText }}
       </section>
       <section class="announcementSubject">
         {{ announcement.subject }}
@@ -50,6 +48,11 @@ export default {
         .replaceAll("\n", "\n<br>\n")
         .replaceAll(/(http\S+)/g, "<a href='$1'>$1</a>");
     },
+    localeText() {
+      if (!this.announcement.locs) return "All locales";
+      if (this.announcement.locs === "!") return "DDL Locales";
+      return "Locale(s): " + this.announcement.locs;
+    },
   },
 };
 </script>
diff --git a/tools/cldr-apps/src/main/java/org/unicode/cldr/web/AnnouncementData.java b/tools/cldr-apps/src/main/java/org/unicode/cldr/web/AnnouncementData.java
index 061a74b921b..1682fae02ab 100644
--- a/tools/cldr-apps/src/main/java/org/unicode/cldr/web/AnnouncementData.java
+++ b/tools/cldr-apps/src/main/java/org/unicode/cldr/web/AnnouncementData.java
@@ -2,10 +2,11 @@
 
 import com.ibm.icu.dev.util.ElapsedTimer;
 import java.sql.*;
-import java.sql.Timestamp;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
+import java.util.stream.Collectors;
+import org.unicode.cldr.test.SubmissionLocales;
 import org.unicode.cldr.util.*;
 import org.unicode.cldr.web.api.Announcements;
 
@@ -148,6 +149,7 @@ private static void emailNotify(
         }
         String subject = "CLDR Survey Tool announcement: " + request.subject;
         String locs = (request.locs == null || request.locs.isEmpty()) ? "All" : request.locs;
+        if (locs.equals(Announcements.LOCS_NON_TC)) locs = "(DDL Locales)";
         String body =
                 "From: "
                         + poster.name
@@ -223,7 +225,16 @@ private static void addRecipientIfPasses(
         AnnouncementFilter aFilter = new AnnouncementFilter(user);
         Announcements.Announcement a =
                 new Announcements.Announcement(0, poster.id, null, null, null);
-        a.setFilters(request.locs, request.orgs, request.audience);
+        String filterLocs = request.locs;
+        if (filterLocs != null && filterLocs.equals(Announcements.LOCS_NON_TC)) {
+            // expand the filter
+            filterLocs =
+                    SurveyMain.getLocalesSet().stream()
+                            .filter(loc -> !SubmissionLocales.isTcLocale(loc))
+                            .map(l -> l.getBaseName())
+                            .collect(Collectors.joining(" "));
+        }
+        a.setFilters(filterLocs, request.orgs, request.audience);
         if (aFilter.passes(a)) {
             logger.fine("In AnnouncementData.addRecipientIfPasses, adding recipient: " + user.id);
             recipients.add(user.id);
@@ -470,6 +481,8 @@ private boolean matchOrg(String orgs, int posterId) {
                 return true;
             } else if (Announcements.ORGS_TC.equals(orgs)) {
                 return user.getOrganization().isTCOrg();
+            } else if (Announcements.ORGS_NON_TC.equals(orgs)) {
+                return !user.getOrganization().isTCOrg();
             } else if (Announcements.ORGS_MINE.equals(orgs)) {
                 UserRegistry.User posterUser = CookieSession.sm.reg.getInfo(posterId);
                 return posterUser != null && posterUser.isSameOrg(user);
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 1688aefb68e..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
@@ -25,15 +27,26 @@ 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 =
             new HashSet<>(
                     Arrays.asList(
                             AUDIENCE_TC, AUDIENCE_MANAGERS, AUDIENCE_VETTERS, AUDIENCE_EVERYONE));
     private static final Set<String> validOrgs =
-            new HashSet<>(Arrays.asList(ORGS_MINE, ORGS_TC, ORGS_ALL));
+            new HashSet<>(Arrays.asList(ORGS_MINE, ORGS_NON_TC, ORGS_TC, ORGS_ALL));
 
     @GET
     @Produces(MediaType.APPLICATION_JSON)
@@ -242,6 +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;
 
@@ -250,7 +266,14 @@ public boolean isValid() {
         }
 
         public void normalize() {
-            if (locs != null) {
+            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();