diff --git a/gnss/2.0/Android.bp b/gnss/2.0/Android.bp
index 9b6b076..9b04be0 100644
--- a/gnss/2.0/Android.bp
+++ b/gnss/2.0/Android.bp
@@ -19,6 +19,7 @@
     ],
     interfaces: [
         "android.hardware.gnss.measurement_corrections@1.0",
+        "android.hardware.gnss.visibility_control@1.0",
         "android.hardware.gnss@1.0",
         "android.hardware.gnss@1.1",
         "android.hidl.base@1.0",
diff --git a/gnss/2.0/IGnss.hal b/gnss/2.0/IGnss.hal
index e1acd6d..1f1858e 100644
--- a/gnss/2.0/IGnss.hal
+++ b/gnss/2.0/IGnss.hal
@@ -17,6 +17,7 @@
 package android.hardware.gnss@2.0;
 
 import android.hardware.gnss.measurement_corrections@1.0::IMeasurementCorrections;
+import android.hardware.gnss.visibility_control@1.0::IGnssVisibilityControl;
 import @1.1::IGnss;
 
 import IGnssCallback;
@@ -25,7 +26,15 @@
 import IAGnss;
 import IAGnssRil;
 
-/** Represents the standard GNSS (Global Navigation Satellite System) interface. */
+/**
+ * Represents the standard GNSS (Global Navigation Satellite System) interface.
+ *
+ * Due to the introduction of new GNSS HAL package android.hardware.gnss.visibility_control@1.0
+ * the interface @1.0::IGnssNi.hal and @1.0::IGnssNiCallback.hal are deprecated in this version
+ * and are not supported by the framework. The GNSS HAL implementation of this interface
+ * must return nullptr for the following @1.0::IGnss method.
+ *      getExtensionGnssNi() generates (IGnssNi gnssNiIface);
+ */
 interface IGnss extends @1.1::IGnss {
     /**
      * Opens the interface and provides the callback routines to the implementation of this
@@ -76,6 +85,13 @@
      *
      * @return measurementCorrectionsIface Handle to the IMeasurementCorrections interface.
      */
-     getExtensionMeasurementCorrections()
+    getExtensionMeasurementCorrections()
             generates (IMeasurementCorrections measurementCorrectionsIface);
-};
+
+    /**
+     * This method returns the IGnssVisibilityControl interface.
+     *
+     * @return visibilityControlIface Handle to the IGnssVisibilityControl interface.
+     */
+    getExtensionVisibilityControl() generates (IGnssVisibilityControl visibilityControlIface);
+};
\ No newline at end of file
diff --git a/gnss/2.0/default/Android.bp b/gnss/2.0/default/Android.bp
index 92d5c1f..985aa2b 100644
--- a/gnss/2.0/default/Android.bp
+++ b/gnss/2.0/default/Android.bp
@@ -26,6 +26,7 @@
         "AGnssRil.cpp",
         "Gnss.cpp",
         "GnssMeasurement.cpp",
+        "GnssVisibilityControl.cpp",
         "service.cpp"
     ],
     shared_libs: [
@@ -35,6 +36,7 @@
         "liblog",
         "android.hardware.gnss@2.0",
         "android.hardware.gnss.measurement_corrections@1.0",
+        "android.hardware.gnss.visibility_control@1.0",
         "android.hardware.gnss@1.0",
         "android.hardware.gnss@1.1",
     ],
diff --git a/gnss/2.0/default/Gnss.cpp b/gnss/2.0/default/Gnss.cpp
index 5c752d5..217f0f3 100644
--- a/gnss/2.0/default/Gnss.cpp
+++ b/gnss/2.0/default/Gnss.cpp
@@ -22,8 +22,10 @@
 #include "AGnssRil.h"
 #include "GnssConfiguration.h"
 #include "GnssMeasurement.h"
+#include "GnssVisibilityControl.h"
 
 using ::android::hardware::Status;
+using ::android::hardware::gnss::visibility_control::V1_0::implementation::GnssVisibilityControl;
 
 namespace android {
 namespace hardware {
@@ -93,8 +95,8 @@
 }
 
 Return<sp<V1_0::IGnssNi>> Gnss::getExtensionGnssNi() {
-    // TODO implement
-    return sp<V1_0::IGnssNi>{};
+    // The IGnssNi.hal interface is deprecated in 2.0.
+    return nullptr;
 }
 
 Return<sp<V1_0::IGnssMeasurement>> Gnss::getExtensionGnssMeasurement() {
@@ -205,6 +207,11 @@
     return sp<measurement_corrections::V1_0::IMeasurementCorrections>{};
 }
 
+Return<sp<visibility_control::V1_0::IGnssVisibilityControl>> Gnss::getExtensionVisibilityControl() {
+    ALOGD("Gnss::getExtensionVisibilityControl");
+    return new GnssVisibilityControl();
+}
+
 Return<bool> Gnss::setCallback_2_0(const sp<V2_0::IGnssCallback>& callback) {
     ALOGD("Gnss::setCallback_2_0");
     if (callback == nullptr) {
diff --git a/gnss/2.0/default/Gnss.h b/gnss/2.0/default/Gnss.h
index e86158f..890b026 100644
--- a/gnss/2.0/default/Gnss.h
+++ b/gnss/2.0/default/Gnss.h
@@ -79,6 +79,8 @@
     Return<bool> setCallback_2_0(const sp<V2_0::IGnssCallback>& callback) override;
     Return<sp<measurement_corrections::V1_0::IMeasurementCorrections>>
     getExtensionMeasurementCorrections() override;
+    Return<sp<visibility_control::V1_0::IGnssVisibilityControl>> getExtensionVisibilityControl()
+            override;
 
    private:
     static sp<V2_0::IGnssCallback> sGnssCallback_2_0;
diff --git a/gnss/2.0/default/GnssVisibilityControl.cpp b/gnss/2.0/default/GnssVisibilityControl.cpp
new file mode 100644
index 0000000..99b8e34
--- /dev/null
+++ b/gnss/2.0/default/GnssVisibilityControl.cpp
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "GnssVisibilityControl"
+
+#include "GnssVisibilityControl.h"
+#include <log/log.h>
+
+namespace android {
+namespace hardware {
+namespace gnss {
+namespace visibility_control {
+namespace V1_0 {
+namespace implementation {
+
+// Methods from ::android::hardware::gnss::visibility_control::V1_0::IGnssVisibilityControl follow.
+Return<bool> GnssVisibilityControl::enableNfwLocationAccess(
+        const hidl_vec<hidl_string>& proxyApps) {
+    std::string os;
+    bool first = true;
+    for (const auto& proxyApp : proxyApps) {
+        if (first) {
+            first = false;
+        } else {
+            os += " ";
+        }
+
+        os += proxyApp;
+    }
+
+    ALOGD("enableNfwLocationAccess proxyApps: %s", os.c_str());
+    return true;
+}
+
+Return<bool> GnssVisibilityControl::setCallback(const sp<V1_0::IGnssVisibilityControlCallback>&) {
+    return true;
+}
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace visibility_control
+}  // namespace gnss
+}  // namespace hardware
+}  // namespace android
diff --git a/gnss/2.0/default/GnssVisibilityControl.h b/gnss/2.0/default/GnssVisibilityControl.h
new file mode 100644
index 0000000..45febff
--- /dev/null
+++ b/gnss/2.0/default/GnssVisibilityControl.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_HARDWARE_GNSS_VISIBILITY_CONTROL_V1_0_GNSSVISIBILITYCONTROL_H
+#define ANDROID_HARDWARE_GNSS_VISIBILITY_CONTROL_V1_0_GNSSVISIBILITYCONTROL_H
+
+#include <android/hardware/gnss/visibility_control/1.0/IGnssVisibilityControl.h>
+#include <hidl/MQDescriptor.h>
+#include <hidl/Status.h>
+
+namespace android {
+namespace hardware {
+namespace gnss {
+namespace visibility_control {
+namespace V1_0 {
+namespace implementation {
+
+using ::android::sp;
+using ::android::hardware::hidl_array;
+using ::android::hardware::hidl_memory;
+using ::android::hardware::hidl_string;
+using ::android::hardware::hidl_vec;
+using ::android::hardware::Return;
+using ::android::hardware::Void;
+
+struct GnssVisibilityControl : public IGnssVisibilityControl {
+    // Methods from ::android::hardware::gnss::visibility_control::V1_0::IGnssVisibilityControl
+    // follow.
+    Return<bool> enableNfwLocationAccess(const hidl_vec<hidl_string>& proxyApps) override;
+    Return<bool> setCallback(const sp<V1_0::IGnssVisibilityControlCallback>& callback) override;
+};
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace visibility_control
+}  // namespace gnss
+}  // namespace hardware
+}  // namespace android
+
+#endif  // ANDROID_HARDWARE_GNSS_VISIBILITY_CONTROL_V1_0_GNSSVISIBILITYCONTROL_H
\ No newline at end of file
diff --git a/gnss/2.0/vts/functional/Android.bp b/gnss/2.0/vts/functional/Android.bp
index 894716d..684b381 100644
--- a/gnss/2.0/vts/functional/Android.bp
+++ b/gnss/2.0/vts/functional/Android.bp
@@ -24,6 +24,7 @@
     ],
     static_libs: [
         "android.hardware.gnss.measurement_corrections@1.0",
+        "android.hardware.gnss.visibility_control@1.0",
         "android.hardware.gnss@1.0",
         "android.hardware.gnss@1.1",
         "android.hardware.gnss@2.0",
diff --git a/gnss/2.0/vts/functional/gnss_hal_test_cases.cpp b/gnss/2.0/vts/functional/gnss_hal_test_cases.cpp
index cef06a2..552cf1b 100644
--- a/gnss/2.0/vts/functional/gnss_hal_test_cases.cpp
+++ b/gnss/2.0/vts/functional/gnss_hal_test_cases.cpp
@@ -19,6 +19,7 @@
 #include <VtsHalHidlTargetTestBase.h>
 #include <gnss_hal_test.h>
 
+using android::hardware::hidl_string;
 using android::hardware::hidl_vec;
 
 using IGnssConfiguration_2_0 = android::hardware::gnss::V2_0::IGnssConfiguration;
@@ -30,6 +31,8 @@
 using IAGnss_2_0 = android::hardware::gnss::V2_0::IAGnss;
 using IAGnss_1_0 = android::hardware::gnss::V1_0::IAGnss;
 using IAGnssCallback_2_0 = android::hardware::gnss::V2_0::IAGnssCallback;
+using android::hardware::gnss::V1_0::IGnssNi;
+using android::hardware::gnss::visibility_control::V1_0::IGnssVisibilityControl;
 
 /*
  * SetupTeardownCreateCleanup:
@@ -117,7 +120,7 @@
  * The GNSS HAL 2.0 implementation must support @2.0::IAGnssRil interface due to the deprecation
  * of framework network API methods needed to support the @1.0::IAGnssRil interface.
  *
- * TODO (b/121287858): Enforce gnss@2.0 HAL package is supported on devices launced with Q or later.
+ * TODO (b/121287858): Enforce gnss@2.0 HAL package is supported on devices launched with Q or later
  */
 TEST_F(GnssHalTest, TestAGnssRilExtension) {
     auto agnssRil = gnss_hal_->getExtensionAGnssRil_2_0();
@@ -199,7 +202,7 @@
  * The GNSS HAL 2.0 implementation must support @2.0::IAGnss interface due to the deprecation
  * of framework network API methods needed to support the @1.0::IAGnss interface.
  *
- * TODO (b/121287858): Enforce gnss@2.0 HAL package is supported on devices launced with Q or later.
+ * TODO (b/121287858): Enforce gnss@2.0 HAL package is supported on devices launched with Q or later
  */
 TEST_F(GnssHalTest, TestAGnssExtension) {
     // Verify IAGnss 2.0 is supported.
@@ -218,10 +221,45 @@
  * TestAGnssExtension_1_0_Deprecation:
  * Gets the @1.0::IAGnss extension and verifies that it is a nullptr.
  *
- * TODO (b/121287858): Enforce gnss@2.0 HAL package is supported on devices launced with Q or later.
+ * TODO (b/121287858): Enforce gnss@2.0 HAL package is supported on devices launched with Q or later
  */
 TEST_F(GnssHalTest, TestAGnssExtension_1_0_Deprecation) {
     // Verify IAGnss 1.0 is not supported.
     auto agnss_1_0 = gnss_hal_->getExtensionAGnss();
     ASSERT_TRUE(!agnss_1_0.isOk() || ((sp<IAGnss_1_0>)agnss_1_0) == nullptr);
 }
+
+/*
+ * TestGnssNiExtension_Deprecation:
+ * Gets the @1.0::IGnssNi extension and verifies that it is a nullptr.
+ *
+ * TODO (b/121287858): Enforce gnss@2.0 HAL package is supported on devices launched with Q or later
+ */
+TEST_F(GnssHalTest, TestGnssNiExtension_Deprecation) {
+    // Verify IGnssNi 1.0 is not supported.
+    auto gnssNi = gnss_hal_->getExtensionGnssNi();
+    ASSERT_TRUE(!gnssNi.isOk() || ((sp<IGnssNi>)gnssNi) == nullptr);
+}
+
+/*
+ * TestGnssVisibilityControlExtension:
+ * Gets the GnssVisibilityControlExtension and verifies that it supports the
+ * gnss.visibility_control@1.0::IGnssVisibilityControl interface by invoking a method.
+ *
+ * The GNSS HAL 2.0 implementation must support gnss.visibility_control@1.0::IGnssVisibilityControl.
+ *
+ * TODO (b/121287858): Enforce gnss@2.0 HAL package is supported on devices launched with Q or later
+ */
+TEST_F(GnssHalTest, TestGnssVisibilityControlExtension) {
+    // Verify IGnssVisibilityControl is supported.
+    auto gnssVisibilityControl = gnss_hal_->getExtensionVisibilityControl();
+    ASSERT_TRUE(gnssVisibilityControl.isOk());
+    sp<IGnssVisibilityControl> iGnssVisibilityControl = gnssVisibilityControl;
+    ASSERT_NE(iGnssVisibilityControl, nullptr);
+
+    // Set non-framework proxy apps.
+    hidl_vec<hidl_string> proxyApps{"ims.example.com", "mdt.example.com"};
+    auto result = iGnssVisibilityControl->enableNfwLocationAccess(proxyApps);
+    ASSERT_TRUE(result.isOk());
+    EXPECT_TRUE(result);
+}
diff --git a/gnss/visibility_control/1.0/Android.bp b/gnss/visibility_control/1.0/Android.bp
new file mode 100644
index 0000000..40a28c9
--- /dev/null
+++ b/gnss/visibility_control/1.0/Android.bp
@@ -0,0 +1,18 @@
+// This file is autogenerated by hidl-gen -Landroidbp.
+
+hidl_interface {
+    name: "android.hardware.gnss.visibility_control@1.0",
+    root: "android.hardware",
+    vndk: {
+        enabled: true,
+    },
+    srcs: [
+        "IGnssVisibilityControl.hal",
+        "IGnssVisibilityControlCallback.hal",
+    ],
+    interfaces: [
+        "android.hidl.base@1.0",
+    ],
+    gen_java: true,
+}
+
diff --git a/gnss/visibility_control/1.0/IGnssVisibilityControl.hal b/gnss/visibility_control/1.0/IGnssVisibilityControl.hal
new file mode 100644
index 0000000..9148127
--- /dev/null
+++ b/gnss/visibility_control/1.0/IGnssVisibilityControl.hal
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.gnss.visibility_control@1.0;
+
+import IGnssVisibilityControlCallback;
+
+/**
+ * Represents the GNSS location reporting permissions and notification interface.
+ *
+ * This interface is used to tell the GNSS HAL implementation whether the framework user has
+ * granted permission to the GNSS HAL implementation to provide GNSS location information for
+ * non-framework (NFW), non-user initiated emergency use cases, and to notify the framework user
+ * of these GNSS location information deliveries.
+ *
+ * For user initiated emergency cases (and for the configured extended emergency session duration),
+ * the GNSS HAL implementation must serve the emergency location supporting network initiated
+ * location requests immediately irrespective of this permission settings.
+ *
+ * There is no separate need for the GNSS HAL implementation to monitor the global device location
+ * on/off setting. Permission to use GNSS for non-framework use cases is expressly controlled
+ * by the method enableNfwLocationAccess(). The framework monitors the location permission settings
+ * of the configured proxy applications(s), and device location settings, and calls the method
+ * enableNfwLocationAccess() whenever the user control proxy applications have, or do not have,
+ * location permission. The proxy applications are used to provide user visibility and control of
+ * location access by the non-framework on/off device entities they are representing.
+ *
+ * For device user visibility, the GNSS HAL implementation must call the method
+ * IGnssVisibilityControlCallback.nfwNotifyCb() whenever location request is rejected or
+ * location information is provided to non-framework entities (on or off device). This includes
+ * the network initiated location requests for user-initiated emergency use cases as well.
+ *
+ * The HAL implementations that support this interface must not report GNSS location, measurement,
+ * status, or other information that can be used to derive user location to any entity when not
+ * expressly authorized by this HAL. This includes all endpoints for location information
+ * off the device, including carriers, vendors, OEM and others directly or indirectly.
+ */
+interface IGnssVisibilityControl {
+    /**
+     * Enables/disables non-framework entity location access permission in the GNSS HAL.
+     *
+     * The framework will call this method to update GNSS HAL implementation every time the
+     * framework user, through the given proxy application(s) and/or device location settings,
+     * explicitly grants/revokes the location access permission for non-framework, non-user
+     * initiated emergency use cases.
+     *
+     * Whenever the user location information is delivered to non-framework entities, the HAL
+     * implementation must call the method IGnssVisibilityControlCallback.nfwNotifyCb() to notify
+     * the framework for user visibility.
+     *
+     * @param proxyApps Full list of package names of proxy Android applications representing
+     * the non-framework location access entities (on/off the device) for which the framework
+     * user has granted non-framework location access permission. The GNSS HAL implementation
+     * must provide location information only to non-framework entities represented by these
+     * proxy applications.
+     *
+     * The package name of the proxy Android application follows the standard Java language
+     * package naming format. For example, com.example.myapp.
+     *
+     * @return success True if the operation was successful.
+     */
+    enableNfwLocationAccess(vec<string> proxyApps) generates (bool success);
+
+    /**
+     * Registers the callback for HAL implementation to use.
+     *
+     * @param callback Handle to IGnssVisibilityControlCallback interface.
+     */
+    setCallback(IGnssVisibilityControlCallback callback) generates (bool success);
+};
\ No newline at end of file
diff --git a/gnss/visibility_control/1.0/IGnssVisibilityControlCallback.hal b/gnss/visibility_control/1.0/IGnssVisibilityControlCallback.hal
new file mode 100644
index 0000000..5a582c2
--- /dev/null
+++ b/gnss/visibility_control/1.0/IGnssVisibilityControlCallback.hal
@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.gnss.visibility_control@1.0;
+
+/**
+ * GNSS location reporting permissions and notification callback interface.
+ */
+interface IGnssVisibilityControlCallback {
+    /**
+     * Protocol stack that is requesting the non-framework location information.
+     */
+    enum NfwProtocolStack : uint8_t {
+        /** Cellular control plane requests */
+        CTRL_PLANE                      = 0,
+        /** All types of SUPL requests */
+        SUPL                            = 1,
+
+        /** All types of requests from IMS */
+        IMS                             = 10,
+        /** All types of requests from SIM */
+        SIM                             = 11,
+
+        /** Requests from other protocol stacks */
+        OTHER_PROTOCOL_STACK            = 100
+    };
+
+    /*
+     * Entity that is requesting/receiving the location information.
+     */
+    enum NfwRequestor : uint8_t {
+        /** Wireless service provider */
+        CARRIER                         = 0,
+
+        /** Device manufacturer */
+        OEM                             = 10,
+        /** Modem chipset vendor */
+        MODEM_CHIPSET_VENDOR            = 11,
+        /** GNSS chipset vendor */
+        GNSS_CHIPSET_VENDOR             = 12,
+        /** Other chipset vendor */
+        OTHER_CHIPSET_VENDOR            = 13,
+
+        /** Automobile client */
+        AUTOMOBILE_CLIENT               = 20,
+
+        /** Other sources */
+        OTHER_REQUESTOR                 = 100
+     };
+
+    /**
+     * GNSS response type for non-framework location requests.
+     */
+    enum NfwResponseType : uint8_t {
+        /** Request rejected because framework has not given permission for this use case */
+        REJECTED                        = 0,
+
+        /** Request accepted but could not provide location because of a failure */
+        ACCEPTED_NO_LOCATION_PROVIDED   = 1,
+
+        /** Request accepted and location provided */
+        ACCEPTED_LOCATION_PROVIDED      = 2,
+     };
+
+    /**
+     * Represents a non-framework location information request/response notification.
+     */
+    struct NfwNotification {
+        /**
+         * Package name of the Android proxy application representing the non-framework
+         * entity that requested location. Set to empty string if unknown.
+         */
+        string proxyAppPackageName;
+
+        /** Protocol stack that initiated the non-framework location request. */
+        NfwProtocolStack protocolStack;
+
+        /**
+         * Name of the protocol stack if protocolStack field is set to OTHER_PROTOCOL_STACK.
+         * Otherwise, set to empty string.
+         *
+         * This field is opaque to the framework and used for logging purposes.
+         */
+        string otherProtocolStackName;
+
+        /** Source initiating/receiving the location information. */
+        NfwRequestor requestor;
+
+        /**
+         * Identity of the endpoint receiving the location information. For example, carrier
+         * name, OEM name, SUPL SLP/E-SLP FQDN, chipset vendor name, etc.
+         *
+         * This field is opaque to the framework and used for logging purposes.
+         */
+        string requestorId;
+
+        /** Indicates whether location information was provided for this request. */
+        NfwResponseType responseType;
+
+        /** Is the device in user initiated emergency session. */
+        bool inEmergencyMode;
+
+        /** Is cached location provided */
+        bool isCachedLocation;
+    };
+
+    /**
+     * Callback to report a non-framework delivered location.
+     *
+     * The GNSS HAL implementation must call this method to notify the framework whenever
+     * a non-framework location request is made to the GNSS HAL.
+     *
+     * Non-framework entities like low power sensor hubs that request location from GNSS and
+     * only pass location information through Android framework controls are exempt from this
+     * power-spending reporting. However, low power sensor hubs or other chipsets which may send
+     * the location information to anywhere other than Android framework (which provides user
+     * visibility and control), must report location information use through this API whenever
+     * location information (or events driven by that location such as "home" location detection)
+     * leaves the domain of that low power chipset.
+     *
+     * To avoid overly spamming the framework, high speed location reporting of the exact same
+     * type may be throttled to report location at a lower rate than the actual report rate, as
+     * long as the location is reported with a latency of no more than the larger of 5 seconds,
+     * or the next the Android processor awake time. For example, if an Automotive client is
+     * getting location information from the GNSS location system at 20Hz, this method may be
+     * called at 1Hz. As another example, if a low power processor is getting location from the
+     * GNSS chipset, and the Android processor is asleep, the notification to the Android HAL may
+     * be delayed until the next wake of the Android processor.
+     *
+     * @param notification Non-framework delivered location request/response description.
+     */
+    nfwNotifyCb(NfwNotification notification);
+
+    /**
+     * Tells if the device is currently in an emergency session.
+     *
+     * Emergency session is defined as the device being actively in a user initiated emergency
+     * call or in post emergency call extension time period.
+     *
+     * If the GNSS HAL implementation cannot determine if the device is in emergency session
+     * mode, it must call this method to confirm that the device is in emergency session before
+     * serving network initiated emergency SUPL and Control Plane location requests.
+     *
+     * @return success True if the framework determines that the device is in emergency session.
+     */
+    isInEmergencySession() generates (bool success);
+};
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