diff --git a/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/IContextHub.aidl b/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/IContextHub.aidl
index 272d768..c1f4df8 100644
--- a/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/IContextHub.aidl
+++ b/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/IContextHub.aidl
@@ -46,5 +46,6 @@
   void onHostEndpointConnected(in android.hardware.contexthub.HostEndpointInfo hostEndpointInfo);
   void onHostEndpointDisconnected(char hostEndpointId);
   long[] getPreloadedNanoappIds();
+  void onNanSessionStateChanged(in boolean state);
   const int EX_CONTEXT_HUB_UNSPECIFIED = -1;
 }
diff --git a/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/IContextHubCallback.aidl b/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/IContextHubCallback.aidl
index f81f7cf..e72ae73 100644
--- a/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/IContextHubCallback.aidl
+++ b/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/IContextHubCallback.aidl
@@ -38,4 +38,6 @@
   void handleContextHubMessage(in android.hardware.contexthub.ContextHubMessage msg, in String[] msgContentPerms);
   void handleContextHubAsyncEvent(in android.hardware.contexthub.AsyncEventType evt);
   void handleTransactionResult(in int transactionId, in boolean success);
+  void handleNanSessionRequest(in boolean enable);
+  const int CONTEXTHUB_NAN_TRANSACTION_TIMEOUT_MS = 10000;
 }
diff --git a/contexthub/aidl/android/hardware/contexthub/IContextHub.aidl b/contexthub/aidl/android/hardware/contexthub/IContextHub.aidl
index 9fa67a5..7f50730 100644
--- a/contexthub/aidl/android/hardware/contexthub/IContextHub.aidl
+++ b/contexthub/aidl/android/hardware/contexthub/IContextHub.aidl
@@ -204,6 +204,19 @@
     long[] getPreloadedNanoappIds();
 
     /**
+     * Invoked when the state of the NAN session requested through handleNanSessionRequest()
+     * changes. This function may be invoked without a corresponding handleNanSessionRequest to
+     * indicate if a NAN session was terminated without a request due to resource limitations.
+     *
+     * If the state becomes disabled without an explicit request from the HAL, the HAL MUST
+     * explicitly invoke handleNanSessionRequest() at a later point in time to attempt to
+     * re-enable NAN.
+     *
+     * @param state True if the NAN session is currently enabled.
+     */
+    void onNanSessionStateChanged(in boolean state);
+
+    /**
      * Error codes that are used as service specific errors with the AIDL return
      * value EX_SERVICE_SPECIFIC.
      */
diff --git a/contexthub/aidl/android/hardware/contexthub/IContextHubCallback.aidl b/contexthub/aidl/android/hardware/contexthub/IContextHubCallback.aidl
index e385d48..cff1893 100644
--- a/contexthub/aidl/android/hardware/contexthub/IContextHubCallback.aidl
+++ b/contexthub/aidl/android/hardware/contexthub/IContextHubCallback.aidl
@@ -74,4 +74,25 @@
      *
      */
     void handleTransactionResult(in int transactionId, in boolean success);
+
+    /**
+     * This callback is passed by the Contexthub service to the HAL implementation to allow the HAL
+     * to request a WiFi NAN session is created to allow the Contexthub to be able to utilize NAN
+     * functionality.
+     *
+     * onNanSessionStateChanged() will be invoked asynchronously after the NAN session request has
+     * been completed. This must be done within CONTEXTHUB_NAN_TRANSACTION_TIMEOUT_MS. If the
+     * request times out, onNanSessionStateChanged() will be invoked with the state that the session
+     * was previously in.
+     *
+     * @param enable Whether the NAN session should be enabled or disabled depending on whether the
+     *        Contexthub needs access to NAN.
+     */
+    void handleNanSessionRequest(in boolean enable);
+
+    /**
+     * Amount of time, in milliseconds, that a handleNanSessionRequest can be pending before the
+     * Contexthub service must respond.
+     */
+    const int CONTEXTHUB_NAN_TRANSACTION_TIMEOUT_MS = 10000;
 }
diff --git a/contexthub/aidl/default/ContextHub.cpp b/contexthub/aidl/default/ContextHub.cpp
index ac1dc46..615ac5c 100644
--- a/contexthub/aidl/default/ContextHub.cpp
+++ b/contexthub/aidl/default/ContextHub.cpp
@@ -87,6 +87,10 @@
     return ndk::ScopedAStatus::ok();
 }
 
+ScopedAStatus ContextHub::onNanSessionStateChanged(bool /*sin_state*/) {
+    return ndk::ScopedAStatus::ok();
+}
+
 ScopedAStatus ContextHub::registerCallback(int32_t in_contextHubId,
                                            const std::shared_ptr<IContextHubCallback>& in_cb) {
     if (in_contextHubId == kMockHubId) {
diff --git a/contexthub/aidl/default/include/contexthub-impl/ContextHub.h b/contexthub/aidl/default/include/contexthub-impl/ContextHub.h
index 4aeb948..b3998b9 100644
--- a/contexthub/aidl/default/include/contexthub-impl/ContextHub.h
+++ b/contexthub/aidl/default/include/contexthub-impl/ContextHub.h
@@ -47,6 +47,7 @@
     ::ndk::ScopedAStatus onHostEndpointConnected(const HostEndpointInfo& in_info) override;
 
     ::ndk::ScopedAStatus onHostEndpointDisconnected(char16_t in_hostEndpointId) override;
+    ::ndk::ScopedAStatus onNanSessionStateChanged(bool in_state) override;
 
   private:
     static constexpr uint32_t kMockHubId = 0;
diff --git a/contexthub/aidl/vts/VtsAidlHalContextHubTargetTest.cpp b/contexthub/aidl/vts/VtsAidlHalContextHubTargetTest.cpp
index 8104f27..4731648 100644
--- a/contexthub/aidl/vts/VtsAidlHalContextHubTargetTest.cpp
+++ b/contexthub/aidl/vts/VtsAidlHalContextHubTargetTest.cpp
@@ -100,6 +100,8 @@
     Status handleTransactionResult(int32_t /* transactionId */, bool /* success */) override {
         return Status::ok();
     }
+
+    Status handleNanSessionRequest(bool /* enable */) override { return Status::ok(); }
 };
 
 TEST_P(ContextHubAidl, TestRegisterCallback) {
@@ -131,6 +133,8 @@
         return Status::ok();
     }
 
+    Status handleNanSessionRequest(bool /* enable */) override { return Status::ok(); }
+
     std::promise<std::vector<NanoappInfo>> promise;
 };
 
@@ -194,6 +198,8 @@
         return Status::ok();
     }
 
+    Status handleNanSessionRequest(bool /* enable */) override { return Status::ok(); }
+
     uint32_t expectedTransactionId = 0;
     std::promise<bool> promise;
 };
@@ -354,6 +360,11 @@
     ASSERT_TRUE(contextHub->onHostEndpointDisconnected(kHostEndpointId).isOk());
 }
 
+TEST_P(ContextHubAidl, TestNanSessionStateChange) {
+    ASSERT_TRUE(contextHub->onNanSessionStateChanged(true /*state*/).isOk());
+    ASSERT_TRUE(contextHub->onNanSessionStateChanged(false /*state*/).isOk());
+}
+
 std::string PrintGeneratedTest(const testing::TestParamInfo<ContextHubAidl::ParamType>& info) {
     return std::string("CONTEXT_HUB_ID_") + std::to_string(std::get<1>(info.param));
 }