diff --git a/api/system-current.txt b/api/system-current.txt
index e077ae40fc4e8..325175b369f34 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -95,6 +95,7 @@ package android {
     field public static final String INJECT_EVENTS = "android.permission.INJECT_EVENTS";
     field public static final String INSTALL_DYNAMIC_SYSTEM = "android.permission.INSTALL_DYNAMIC_SYSTEM";
     field public static final String INSTALL_GRANT_RUNTIME_PERMISSIONS = "android.permission.INSTALL_GRANT_RUNTIME_PERMISSIONS";
+    field public static final String INSTALL_LOCATION_TIME_ZONE_PROVIDER = "android.permission.INSTALL_LOCATION_TIME_ZONE_PROVIDER";
     field public static final String INSTALL_PACKAGE_UPDATES = "android.permission.INSTALL_PACKAGE_UPDATES";
     field public static final String INSTALL_SELF_UPDATES = "android.permission.INSTALL_SELF_UPDATES";
     field public static final String INTENT_FILTER_VERIFICATION_AGENT = "android.permission.INTENT_FILTER_VERIFICATION_AGENT";
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 7247e4fd33116..4c5d4d9aa9731 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -1575,6 +1575,13 @@
     <permission android:name="android.permission.INSTALL_LOCATION_PROVIDER"
         android:protectionLevel="signature|privileged" />
 
+    <!-- @SystemApi @hide Allows an application to install a LocationTimeZoneProvider into the
+         LocationTimeZoneProviderManager.
+         <p>Not for use by third-party applications.
+    -->
+    <permission android:name="android.permission.INSTALL_LOCATION_TIME_ZONE_PROVIDER"
+        android:protectionLevel="signature|privileged" />
+
     <!-- @SystemApi @hide Allows HDMI-CEC service to access device and configuration files.
          This should only be used by HDMI-CEC service.
     -->
diff --git a/core/res/res/values/config.xml b/core/res/res/values/config.xml
index cc4d306c25936..71e9ed7bee58e 100644
--- a/core/res/res/values/config.xml
+++ b/core/res/res/values/config.xml
@@ -1578,6 +1578,16 @@
          config_timeZoneRulesUpdateTrackingEnabled are true.] -->
     <integer name="config_timeZoneRulesCheckRetryCount">5</integer>
 
+    <!-- Whether to enable primary location time zone provider overlay which allows the primary
+         location time zone provider to be replaced by an app at run-time. When disabled, only the
+         config_primaryLocationTimeZoneProviderPackageName package will be searched for the primary
+         location time zone provider, otherwise any system package is eligible. Anyone who wants to
+         disable the overlay mechanism can set it to false. -->
+    <bool name="config_enablePrimaryLocationTimeZoneOverlay" translatable="false">false</bool>
+    <!-- Package name providing the primary location time zone provider. Used only when
+         config_enablePrimaryLocationTimeZoneOverlay is false. -->
+    <string name="config_primaryLocationTimeZoneProviderPackageName" translatable="false">@null</string>
+
     <!-- Whether to enable network location overlay which allows network location provider to be
          replaced by an app at run-time. When disabled, only the
          config_networkLocationProviderPackageName package will be searched for network location
diff --git a/core/res/res/values/symbols.xml b/core/res/res/values/symbols.xml
index 812e895c77453..3e595493d07d7 100644
--- a/core/res/res/values/symbols.xml
+++ b/core/res/res/values/symbols.xml
@@ -2158,6 +2158,8 @@
   <java-symbol type="string" name="config_defaultNetworkScorerPackageName" />
   <java-symbol type="string" name="config_persistentDataPackageName" />
   <java-symbol type="string" name="config_deviceConfiguratorPackageName" />
+  <java-symbol type="bool" name="config_enablePrimaryLocationTimeZoneOverlay" />
+  <java-symbol type="string" name="config_primaryLocationTimeZoneProviderPackageName" />
 
   <java-symbol type="layout" name="resolver_list" />
   <java-symbol type="id" name="resolver_list" />
diff --git a/non-updatable-api/system-current.txt b/non-updatable-api/system-current.txt
index f116c80e85d69..18495294fbc45 100644
--- a/non-updatable-api/system-current.txt
+++ b/non-updatable-api/system-current.txt
@@ -95,6 +95,7 @@ package android {
     field public static final String INJECT_EVENTS = "android.permission.INJECT_EVENTS";
     field public static final String INSTALL_DYNAMIC_SYSTEM = "android.permission.INSTALL_DYNAMIC_SYSTEM";
     field public static final String INSTALL_GRANT_RUNTIME_PERMISSIONS = "android.permission.INSTALL_GRANT_RUNTIME_PERMISSIONS";
+    field public static final String INSTALL_LOCATION_TIME_ZONE_PROVIDER = "android.permission.INSTALL_LOCATION_TIME_ZONE_PROVIDER";
     field public static final String INSTALL_PACKAGE_UPDATES = "android.permission.INSTALL_PACKAGE_UPDATES";
     field public static final String INSTALL_SELF_UPDATES = "android.permission.INSTALL_SELF_UPDATES";
     field public static final String INTENT_FILTER_VERIFICATION_AGENT = "android.permission.INTENT_FILTER_VERIFICATION_AGENT";
diff --git a/services/core/java/com/android/server/location/timezone/LocationTimeZoneManagerService.java b/services/core/java/com/android/server/location/timezone/LocationTimeZoneManagerService.java
index c9a211d96fc05..97d3b826f3ffa 100644
--- a/services/core/java/com/android/server/location/timezone/LocationTimeZoneManagerService.java
+++ b/services/core/java/com/android/server/location/timezone/LocationTimeZoneManagerService.java
@@ -178,9 +178,6 @@ public class LocationTimeZoneManagerService extends Binder {
         if (isInSimulationMode(PRIMARY_PROVIDER_NAME)) {
             proxy = new SimulatedLocationTimeZoneProviderProxy(mContext, mThreadingDomain);
         } else {
-            // TODO Uncomment this code in a later commit.
-            throw new UnsupportedOperationException("Not implemented");
-            /*
             proxy = RealLocationTimeZoneProviderProxy.createAndRegister(
                     mContext,
                     mThreadingDomain,
@@ -188,7 +185,6 @@ public class LocationTimeZoneManagerService extends Binder {
                     com.android.internal.R.bool.config_enablePrimaryLocationTimeZoneOverlay,
                     com.android.internal.R.string.config_primaryLocationTimeZoneProviderPackageName
             );
-            */
         }
         return createLocationTimeZoneProvider(PRIMARY_PROVIDER_NAME, proxy);
     }