diff --git a/contexthub/1.2/IContexthub.hal b/contexthub/1.2/IContexthub.hal
index 4bb9361..04a8cb2 100644
--- a/contexthub/1.2/IContexthub.hal
+++ b/contexthub/1.2/IContexthub.hal
@@ -51,18 +51,6 @@
     registerCallback_1_2(uint32_t hubId, IContexthubCallback cb) generates (Result result);
 
     /**
-     * Send a message to a hub
-     *
-     * @param hubId identifier for hub to send message to
-     * @param msg   message to be sent
-     *
-     * @return result OK if successful, error code otherwise
-     *                BAD_VALUE if parameters are not valid
-     *                TRANSACTION_FAILED if message send failed
-     */
-    sendMessageToHub_1_2(uint32_t hubId, ContextHubMsg msg) generates (Result result);
-
-    /**
      * Notification sent by the framework to indicate that the user
      * has changed a setting.
      *
diff --git a/contexthub/1.2/default/Contexthub.cpp b/contexthub/1.2/default/Contexthub.cpp
index 601eccd..57145fc 100644
--- a/contexthub/1.2/default/Contexthub.cpp
+++ b/contexthub/1.2/default/Contexthub.cpp
@@ -80,12 +80,6 @@
     return Result::BAD_PARAMS;
 }
 
-// We don't expose any nanoapps, therefore all nanoapp-related API calls return with BAD_PARAMS
-Return<Result> Contexthub::sendMessageToHub_1_2(uint32_t /* hubId */,
-                                                const ContextHubMsg& /* msg */) {
-    return Result::BAD_PARAMS;
-}
-
 Return<void> Contexthub::onSettingChanged(SettingV1_1 /*setting*/, SettingValue /*newValue*/) {
     return Void();
 }
diff --git a/contexthub/1.2/default/Contexthub.h b/contexthub/1.2/default/Contexthub.h
index 32b862d..305544d 100644
--- a/contexthub/1.2/default/Contexthub.h
+++ b/contexthub/1.2/default/Contexthub.h
@@ -55,8 +55,6 @@
     Return<Result> registerCallback_1_2(uint32_t hubId,
                                         const sp<V1_2::IContexthubCallback>& cb) override;
 
-    Return<Result> sendMessageToHub_1_2(uint32_t hubId, const ContextHubMsg& msg) override;
-
   private:
     sp<IContextHubCallbackWrapperBase> mCallback;
 };
diff --git a/contexthub/1.2/types.hal b/contexthub/1.2/types.hal
index 5a11efe..5033ce8 100644
--- a/contexthub/1.2/types.hal
+++ b/contexthub/1.2/types.hal
@@ -45,11 +45,8 @@
     @1.0::ContextHubMsg msg_1_0;
 
     /**
-     * The list of Android permissions that the sender of this message has at
-     * the time the message was sent.
-     *
-     * The HAL MUST drop messages to nanoapps if this list of permissions is not
-     * a superset of those of the receiving nanoapp(s).
+     * The list of Android permissions held by the sending nanoapp at the time
+     * the message was sent.
      *
      * The framework MUST drop messages to host apps that don't have a superset
      * of the permissions that the sending nanoapp is using.
diff --git a/contexthub/1.2/vts/functional/VtsHalContexthubV1_2TargetTest.cpp b/contexthub/1.2/vts/functional/VtsHalContexthubV1_2TargetTest.cpp
index c50d43c..3510c23 100644
--- a/contexthub/1.2/vts/functional/VtsHalContexthubV1_2TargetTest.cpp
+++ b/contexthub/1.2/vts/functional/VtsHalContexthubV1_2TargetTest.cpp
@@ -195,39 +195,8 @@
     std::promise<TransactionResult> promise;
 };
 
-// Parameterized fixture that sets the callback to TxnResultCallback
-class ContexthubTxnTest : public ContexthubHidlTest {
-  public:
-    virtual void SetUp() override {
-        ContexthubHidlTest::SetUp();
-        ASSERT_OK(registerCallback_1_2(cb));
-    }
-
-    sp<TxnResultCallback> cb = new TxnResultCallback();
-};
-
-TEST_P(ContexthubTxnTest, TestSendMessageToNonExistentNanoApp) {
-    ContextHubMsg msg;
-    msg.msg_1_0.appName = kNonExistentAppId;
-    msg.msg_1_0.msgType = 1;
-    msg.msg_1_0.msg.resize(4);
-    std::fill(msg.msg_1_0.msg.begin(), msg.msg_1_0.msg.end(), 0);
-
-    ALOGD("Sending message to non-existent nanoapp");
-    Result result = hubApi->sendMessageToHub_1_2(getHubId(), msg);
-    if (result != Result::OK && result != Result::BAD_PARAMS &&
-        result != Result::TRANSACTION_FAILED) {
-        FAIL() << "Got result " << asBaseType(result) << ", expected OK, BAD_PARAMS"
-               << ", or TRANSACTION_FAILED";
-    }
-}
-
 GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(ContexthubHidlTest);
 INSTANTIATE_TEST_SUITE_P(HubIdSpecificTests, ContexthubHidlTest, testing::ValuesIn(kTestParameters),
                          android::hardware::PrintInstanceTupleNameToString<>);
 
-GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(ContexthubTxnTest);
-INSTANTIATE_TEST_SUITE_P(HubIdSpecificTests, ContexthubTxnTest, testing::ValuesIn(kTestParameters),
-                         android::hardware::PrintInstanceTupleNameToString<>);
-
 }  // anonymous namespace