diff --git a/neuralnetworks/1.3/IDevice.hal b/neuralnetworks/1.3/IDevice.hal
index 4931539..79f9c32 100644
--- a/neuralnetworks/1.3/IDevice.hal
+++ b/neuralnetworks/1.3/IDevice.hal
@@ -372,5 +372,5 @@
      */
     allocate(BufferDesc desc, vec<IPreparedModel> preparedModels, vec<BufferRole> inputRoles,
              vec<BufferRole> outputRoles)
-            generates (ErrorStatus status, IBuffer buffer, int32_t token);
+            generates (ErrorStatus status, IBuffer buffer, uint32_t token);
 };
diff --git a/neuralnetworks/1.3/types.hal b/neuralnetworks/1.3/types.hal
index ed577e4..c5dc08c 100644
--- a/neuralnetworks/1.3/types.hal
+++ b/neuralnetworks/1.3/types.hal
@@ -22,9 +22,9 @@
 import @1.0::RequestArgument;
 import @1.2::Model.ExtensionNameAndPrefix;
 import @1.2::Model.ExtensionTypeEncoding;
+import @1.2::Operand.ExtraParams;
 import @1.2::OperandType;
 import @1.2::OperationType;
-import @1.2::SymmPerChannelQuantParams;
 
 import android.hidl.safe_union@1.0::Monostate;
 
@@ -3253,7 +3253,7 @@
      * * 8: An {@link OperandType::INT32} scalar, specifying the stride when
      *      walking through input in the ‘height’ dimension.
      * * 9: An {@link OperandType::INT32} scalar, specifying the number of
-            groups.
+     *      groups.
      * * 10: An {@link OperandType::INT32} scalar, and has to be one of the
      *       {@link FusedActivationFunc} values. Specifies the activation to
      *       invoke on the result.
@@ -5343,27 +5343,7 @@
     /**
      * Additional parameters specific to a particular operand type.
      */
-    safe_union ExtraParams {
-       /**
-        * No additional parameters.
-        */
-       Monostate none;
-
-       /**
-        * Symmetric per-channel quantization parameters.
-        *
-        * Only applicable to operands of type TENSOR_QUANT8_SYMM_PER_CHANNEL.
-        */
-       SymmPerChannelQuantParams channelQuant;
-
-       /**
-        * Extension operand parameters.
-        *
-        * The framework treats this as an opaque data blob.
-        * The format is up to individual extensions.
-        */
-       vec<uint8_t> extension;
-    } extraParams;
+    @1.2::Operand.ExtraParams extraParams;
 };
 
 /**
@@ -5551,7 +5531,7 @@
          * Specifies a driver-managed buffer. It is the token returned from IDevice::allocate,
          * and is specific to the IDevice object.
          */
-        int32_t token;
+        uint32_t token;
     };
 
     /**
@@ -5573,7 +5553,7 @@
      * Time point of the steady clock (as from std::chrono::steady_clock)
      * measured in nanoseconds.
      */
-    uint64_t nanoseconds;
+    uint64_t nanosecondsSinceEpoch;
 };
 
 /**
diff --git a/neuralnetworks/1.3/types.t b/neuralnetworks/1.3/types.t
index d4351ec..3d0d02d 100644
--- a/neuralnetworks/1.3/types.t
+++ b/neuralnetworks/1.3/types.t
@@ -24,9 +24,9 @@
 import @1.0::RequestArgument;
 import @1.2::Model.ExtensionNameAndPrefix;
 import @1.2::Model.ExtensionTypeEncoding;
+import @1.2::Operand.ExtraParams;
 import @1.2::OperandType;
 import @1.2::OperationType;
-import @1.2::SymmPerChannelQuantParams;
 
 import android.hidl.safe_union@1.0::Monostate;
 
@@ -319,27 +319,7 @@
     /**
      * Additional parameters specific to a particular operand type.
      */
-    safe_union ExtraParams {
-       /**
-        * No additional parameters.
-        */
-       Monostate none;
-
-       /**
-        * Symmetric per-channel quantization parameters.
-        *
-        * Only applicable to operands of type TENSOR_QUANT8_SYMM_PER_CHANNEL.
-        */
-       SymmPerChannelQuantParams channelQuant;
-
-       /**
-        * Extension operand parameters.
-        *
-        * The framework treats this as an opaque data blob.
-        * The format is up to individual extensions.
-        */
-       vec<uint8_t> extension;
-    } extraParams;
+    @1.2::Operand.ExtraParams extraParams;
 };
 
 /**
@@ -527,7 +507,7 @@
          * Specifies a driver-managed buffer. It is the token returned from IDevice::allocate,
          * and is specific to the IDevice object.
          */
-        int32_t token;
+        uint32_t token;
     };
 
     /**
@@ -549,7 +529,7 @@
      * Time point of the steady clock (as from std::chrono::steady_clock)
      * measured in nanoseconds.
      */
-    uint64_t nanoseconds;
+    uint64_t nanosecondsSinceEpoch;
 };
 
 /**
diff --git a/neuralnetworks/1.3/vts/functional/GeneratedTestHarness.cpp b/neuralnetworks/1.3/vts/functional/GeneratedTestHarness.cpp
index 8ea0b7e..82f34ff 100644
--- a/neuralnetworks/1.3/vts/functional/GeneratedTestHarness.cpp
+++ b/neuralnetworks/1.3/vts/functional/GeneratedTestHarness.cpp
@@ -122,15 +122,15 @@
     // Return {IBuffer object, token} if successful.
     // Return {nullptr, 0} if device memory is not supported.
     template <IOType ioType>
-    std::pair<sp<IBuffer>, int32_t> allocate(uint32_t index) {
-        std::pair<sp<IBuffer>, int32_t> buffer;
+    std::pair<sp<IBuffer>, uint32_t> allocate(uint32_t index) {
+        std::pair<sp<IBuffer>, uint32_t> buffer;
         allocateInternal<ioType>(index, &buffer);
         return buffer;
     }
 
   private:
     template <IOType ioType>
-    void allocateInternal(uint32_t index, std::pair<sp<IBuffer>, int32_t>* result) {
+    void allocateInternal(uint32_t index, std::pair<sp<IBuffer>, uint32_t>* result) {
         ASSERT_NE(result, nullptr);
 
         // Prepare arguments.
@@ -145,14 +145,14 @@
         // Allocate device memory.
         ErrorStatus status;
         sp<IBuffer> buffer;
-        int32_t token;
-        const auto ret = kDevice->allocate(
-                {}, {kPreparedModel}, inputRoles, outputRoles,
-                [&status, &buffer, &token](ErrorStatus error, const sp<IBuffer>& buf, int32_t tok) {
-                    status = error;
-                    buffer = buf;
-                    token = tok;
-                });
+        uint32_t token;
+        auto cb = [&status, &buffer, &token](ErrorStatus error, const sp<IBuffer>& buf,
+                                             uint32_t tok) {
+            status = error;
+            buffer = buf;
+            token = tok;
+        };
+        const auto ret = kDevice->allocate({}, {kPreparedModel}, inputRoles, outputRoles, cb);
 
         // Check allocation results.
         ASSERT_TRUE(ret.isOk());
@@ -217,7 +217,7 @@
             constRefSize += op.data.alignedSize();
         }
 
-        Operand::ExtraParams extraParams;
+        V1_2::Operand::ExtraParams extraParams;
         if (op.type == TestOperandType::TENSOR_QUANT8_SYMM_PER_CHANNEL) {
             extraParams.channelQuant(SymmPerChannelQuantParams{
                     .scales = op.channelQuant.scales, .channelDim = op.channelQuant.channelDim});
@@ -317,7 +317,7 @@
     // - [2+i, 2+i+o): Output device memories
     DeviceMemoryAllocator allocator(device, preparedModel, testModel);
     std::vector<sp<IBuffer>> buffers;
-    std::vector<int32_t> tokens;
+    std::vector<uint32_t> tokens;
 
     // Model inputs.
     hidl_vec<RequestArgument> inputs(testModel.inputIndexes.size());
diff --git a/neuralnetworks/1.3/vts/functional/QualityOfServiceTests.cpp b/neuralnetworks/1.3/vts/functional/QualityOfServiceTests.cpp
index 62ffcda..2f1e05c 100644
--- a/neuralnetworks/1.3/vts/functional/QualityOfServiceTests.cpp
+++ b/neuralnetworks/1.3/vts/functional/QualityOfServiceTests.cpp
@@ -64,11 +64,11 @@
                     std::chrono::time_point_cast<std::chrono::nanoseconds>(currentTime);
             const uint64_t nanosecondsSinceEpoch =
                     currentTimeInNanoseconds.time_since_epoch().count();
-            deadline.nanoseconds(nanosecondsSinceEpoch);
+            deadline.nanosecondsSinceEpoch(nanosecondsSinceEpoch);
         } break;
         case DeadlineBoundType::UNLIMITED: {
             uint64_t unlimited = std::numeric_limits<uint64_t>::max();
-            deadline.nanoseconds(unlimited);
+            deadline.nanosecondsSinceEpoch(unlimited);
         } break;
     }
     return deadline;
diff --git a/neuralnetworks/1.3/vts/functional/ValidateModel.cpp b/neuralnetworks/1.3/vts/functional/ValidateModel.cpp
index 1245432..0a35e2d 100644
--- a/neuralnetworks/1.3/vts/functional/ValidateModel.cpp
+++ b/neuralnetworks/1.3/vts/functional/ValidateModel.cpp
@@ -50,7 +50,7 @@
 
     OptionalTimePoint deadline;
     if (testDeadline) {
-        deadline.nanoseconds(std::numeric_limits<uint64_t>::max());
+        deadline.nanosecondsSinceEpoch(std::numeric_limits<uint64_t>::max());
     }
 
     sp<PreparedModelCallback> preparedModelCallback = new PreparedModelCallback();
diff --git a/neuralnetworks/1.3/vts/functional/ValidateRequest.cpp b/neuralnetworks/1.3/vts/functional/ValidateRequest.cpp
index 2fd9b64..71fe97f 100644
--- a/neuralnetworks/1.3/vts/functional/ValidateRequest.cpp
+++ b/neuralnetworks/1.3/vts/functional/ValidateRequest.cpp
@@ -61,7 +61,7 @@
 
     OptionalTimePoint deadline;
     if (testDeadline) {
-        deadline.nanoseconds(std::numeric_limits<uint64_t>::max());
+        deadline.nanosecondsSinceEpoch(std::numeric_limits<uint64_t>::max());
     }
 
     // asynchronous