diff --git a/Rakefile b/Rakefile
index f2066f58..1ec4910c 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,7 +1,7 @@
 require 'bundler/gem_tasks'
 
 RELISH_PROJECT = 'trema/pio'
-FLAY_THRESHOLD = 1343
+FLAY_THRESHOLD = 1204
 
 task default: :travis
 task test: [:spec, :cucumber]
diff --git a/features/open_flow13/nicira_reg_move.feature b/features/open_flow13/nicira_reg_move.feature
index 490e846d..34e10136 100644
--- a/features/open_flow13/nicira_reg_move.feature
+++ b/features/open_flow13/nicira_reg_move.feature
@@ -1,42 +1,51 @@
 @open_flow13
 Feature: Pio::NiciraRegMove
 
-  Scenario: new(from: :arp_sender_hardware_address, to: :arp_target_hardware_address)
+  Copies source[source_offset:sourcce_offset+n_bits] to
+  destination[destination_offset:dst_ofs+n_bits], where a[b:c] denotes
+  the bits within 'a' numbered 'b' through 'c' (not including bit 'c').
+
+  Scenario: new(source: :arp_sender_hardware_address, destination: :arp_target_hardware_address)
     When I try to create an OpenFlow action with:
       """
-      Pio::NiciraRegMove.new(from: :arp_sender_hardware_address, to: :arp_target_hardware_address)
+      Pio::NiciraRegMove.new(source: :arp_sender_hardware_address,
+                             destination: :arp_target_hardware_address)
       """
     Then it should finish successfully
     And the action has the following fields and values:
-      | field                  |                        value |
-      | action_type.to_hex     |                       0xffff |
-      | action_length          |                           24 |
-      | experimenter_id.to_hex |                       0x2320 |
-      | experimenter_type      |                            6 |
-      | from                   | :arp_sender_hardware_address |
-      | source_oxm_field       |                           24 |
-      | source_oxm_length      |                            6 |
-      | to                     | :arp_target_hardware_address |
-      | destination_oxm_field  |                           25 |
-      | destination_oxm_length |                            6 |
+      | field              |                        value |
+      | n_bits             |                           48 |
+      | source             | :arp_sender_hardware_address |
+      | source_offset      |                            0 |
+      | destination        | :arp_target_hardware_address |
+      | destination_offset |                            0 |
 
-  Scenario: new(from: :reg0, to: :reg7)
+  Scenario: new(source: :reg0, destination: :reg7)
+    When I try to create an OpenFlow action with:
+      """
+      Pio::NiciraRegMove.new(source: :reg0, destination: :reg7)
+      """
+    Then it should finish successfully
+    And the action has the following fields and values:
+      | field              | value |
+      | n_bits             |    32 |
+      | source             | :reg0 |
+      | source_offset      |     0 |
+      | destination        | :reg7 |
+      | destination_offset |     0 |
+      
+  Scenario: new(source: :reg0, source_offset: 16, destination: :reg7, destination_offset: 16, n_bits: 16)
     When I try to create an OpenFlow action with:
       """
-      Pio::NiciraRegMove.new(from: :reg0, to: :reg7)
+      Pio::NiciraRegMove.new(source: :reg0, source_offset: 16,
+                             destination: :reg7, destination_offset: 16,
+                             n_bits: 16)
       """
     Then it should finish successfully
     And the action has the following fields and values:
-      | field                  |  value |
-      | action_type.to_hex     | 0xffff |
-      | action_length          |     24 |
-      | experimenter_id.to_hex | 0x2320 |
-      | experimenter_type      |      6 |
-      | from                   |  :reg0 |
-      | source_oxm_class       |      1 |
-      | source_oxm_field       |      0 |
-      | source_oxm_length      |      4 |
-      | to                     |  :reg7 |
-      | destination_oxm_class  |      1 |
-      | destination_oxm_field  |      7 |
-      | destination_oxm_length |      4 |
+      | field              | value |
+      | n_bits             |    16 |
+      | source             | :reg0 |
+      | source_offset      |    16 |
+      | destination        | :reg7 |
+      | destination_offset |    16 |      
diff --git a/features/open_flow13/nicira_send_out_port.feature b/features/open_flow13/nicira_send_out_port.feature
index 8ddf50c8..0ca4a6e0 100644
--- a/features/open_flow13/nicira_send_out_port.feature
+++ b/features/open_flow13/nicira_send_out_port.feature
@@ -8,13 +8,8 @@ Feature: Pio::NiciraSendOutPort
       """
     Then it should finish successfully
     And the action has the following fields and values:
-      | field                  |  value |
-      | action_type.to_hex     | 0xffff |
-      | action_length          |     24 |
-      | experimenter_id.to_hex | 0x2320 |
-      | experimenter_type      |     15 |
-      | offset                 |      0 |
-      | source                 |  :reg0 |
-      | max_length             |      0 |
-
-    
+      | field      | value |
+      | offset     |     0 |
+      | n_bits     |    32 |
+      | source     | :reg0 |
+      | max_length |     0 |
diff --git a/lib/pio/open_flow13/nicira_reg_load.rb b/lib/pio/open_flow13/nicira_reg_load.rb
index 0cd0fa2d..3e9b74d9 100644
--- a/lib/pio/open_flow13/nicira_reg_load.rb
+++ b/lib/pio/open_flow13/nicira_reg_load.rb
@@ -44,7 +44,7 @@ def value
       private
 
       def oxm_class
-        destination_oxm_class.superclass.const_get(:OXM_CLASS)
+        destination_oxm_class.const_get(:OXM_CLASS)
       end
 
       def oxm_field
diff --git a/lib/pio/open_flow13/nicira_reg_move.rb b/lib/pio/open_flow13/nicira_reg_move.rb
index 524406b9..072efca0 100644
--- a/lib/pio/open_flow13/nicira_reg_move.rb
+++ b/lib/pio/open_flow13/nicira_reg_move.rb
@@ -1,42 +1,84 @@
-require 'active_support/core_ext/string/inflections'
-require 'pio/open_flow/action'
+require 'pio/open_flow/nicira_action'
+require 'pio/open_flow13/match'
 
 module Pio
   module OpenFlow13
     # NXAST_REG_MOVE action
-    class NiciraRegMove < OpenFlow::Action
-      action_header action_type: 0xffff, action_length: 24
-      uint32 :experimenter_id, value: 0x2320
-      uint16 :experimenter_type, value: 6
-      uint16 :n_bits, initial_value: -> { source_oxm_length * 8 }
-      uint16 :source_offset, value: 0
-      uint16 :destination_offset, value: 0
-      uint16 :source_oxm_class
-      bit7 :source_oxm_field
-      bit1 :source_oxm_hasmask, value: 0
-      uint8 :source_oxm_length
-      uint16 :destination_oxm_class
-      bit7 :destination_oxm_field
-      bit1 :destination_oxm_hasmask, value: 0
-      uint8 :destination_oxm_length
-
-      attr_reader :from
-      attr_reader :to
-
-      # rubocop:disable AbcSize
-      def initialize(options)
-        @from = options.fetch(:from)
-        @to = options.fetch(:to)
-        from_klass = Match.const_get(@from.to_s.classify)
-        to_klass = Match.const_get(@to.to_s.classify)
-        super(source_oxm_class: from_klass.superclass.const_get(:OXM_CLASS),
-              source_oxm_field: from_klass.const_get(:OXM_FIELD),
-              source_oxm_length: from_klass.new.length,
-              destination_oxm_class: to_klass.superclass.const_get(:OXM_CLASS),
-              destination_oxm_field: to_klass.const_get(:OXM_FIELD),
-              destination_oxm_length: to_klass.new.length)
-      end
-      # rubocop:enable AbcSize
+    class NiciraRegMove < OpenFlow::NiciraAction
+      nicira_action_header action_type: 0xffff,
+                           action_length: 24,
+                           subtype: 6
+      uint16 :n_bits, initial_value: -> { _source[:oxm_length] * 8 }
+      uint16 :source_offset, initial_value: 0
+      uint16 :destination_offset, initial_value: 0
+      struct :_source do
+        uint16 :oxm_class
+        bit7 :oxm_field
+        bit1 :oxm_hasmask, value: 0
+        uint8 :oxm_length
+      end
+      struct :_destination do
+        uint16 :oxm_class
+        bit7 :oxm_field
+        bit1 :oxm_hasmask, value: 0
+        uint8 :oxm_length
+      end
+
+      # rubocop:disable MethodLength
+      def initialize(arguments)
+        @source = arguments.fetch(:source)
+        @destination = arguments.fetch(:destination)
+        registers = { _source: { oxm_class: source_oxm_class,
+                                 oxm_field: source_oxm_field,
+                                 oxm_length: source_oxm_length },
+                      _destination: { oxm_class: destination_oxm_class,
+                                      oxm_field: destination_oxm_field,
+                                      oxm_length: destination_oxm_length } }
+        options = [:n_bits,
+                   :source_offset,
+                   :destination_offset].each_with_object({}) do |each, opts|
+          opts[each] = arguments[each] if arguments[each]
+        end
+        super registers.merge(options)
+      end
+      # rubocop:enable MethodLength
+
+      attr_reader :source
+      attr_reader :destination
+
+      private
+
+      def source_oxm_class
+        source_class.const_get(:OXM_CLASS)
+      end
+
+      def source_oxm_field
+        source_class.const_get(:OXM_FIELD)
+      end
+
+      def source_oxm_length
+        source_class.new.length
+      end
+
+      def source_class
+        Match.const_get(@source.to_s.split('_').map(&:capitalize).join)
+      end
+
+      def destination_oxm_class
+        destination_class.const_get(:OXM_CLASS)
+      end
+
+      def destination_oxm_field
+        destination_class.const_get(:OXM_FIELD)
+      end
+
+      def destination_oxm_length
+        destination_class.new.length
+      end
+
+      def destination_class
+        Match.const_get(@destination.to_s.split('_').map(&:capitalize).join)
+      end
     end
   end
 end
diff --git a/lib/pio/open_flow13/nicira_send_out_port.rb b/lib/pio/open_flow13/nicira_send_out_port.rb
index dfdbdbb7..5bbd9765 100644
--- a/lib/pio/open_flow13/nicira_send_out_port.rb
+++ b/lib/pio/open_flow13/nicira_send_out_port.rb
@@ -1,37 +1,57 @@
-require 'pio/open_flow/action'
+require 'pio/open_flow/nicira_action'
+require 'pio/open_flow13/match'
 
 module Pio
   module OpenFlow13
     # NXAST_OUTPUT_REG action
-    class NiciraSendOutPort < OpenFlow::Action
-      action_header action_type: 0xffff, action_length: 24
-      uint32 :experimenter_id, value: 0x2320
-      uint16 :experimenter_type, value: 15
-      bit10 :offset_internal, value: 0
-      bit6 :n_bits_internal
-      uint32 :source_internal
+    class NiciraSendOutPort < OpenFlow::NiciraAction
+      nicira_action_header action_type: 0xffff,
+                           action_length: 24,
+                           subtype: 15
+      bit10 :_offset, value: 0
+      bit6 :_n_bits
+      struct :_source do
+        uint16 :oxm_class
+        bit9 :oxm_field
+        bit7 :oxm_length
+      end
       uint16 :max_length, value: 0
       string :zero, length: 6
 
-      attr_reader :source
-
-      # rubocop:disable AbcSize
-      # rubocop:disable LineLength
       def initialize(source)
         @source = source
-        oxm_klass = Match.const_get(source.to_s.split('_').map(&:capitalize).join)
-        super(n_bits_internal: oxm_klass.new.length * 8 - 1,
-              source_internal: ((oxm_klass.superclass.const_get(:OXM_CLASS) << 16) | (oxm_klass.const_get(:OXM_FIELD) << 9) | oxm_klass.new.length))
+        super(_n_bits: oxm_length * 8 - 1,
+              _source: { oxm_class: oxm_class,
+                         oxm_field: oxm_field,
+                         oxm_length: oxm_length })
       end
-      # rubocop:enable AbcSize
-      # rubocop:enable LineLength
+
+      attr_reader :source
 
       def offset
-        offset_internal
+        _offset
       end
 
       def n_bits
-        n_bits_internal + 1
+        _n_bits + 1
+      end
+
+      private
+
+      def oxm_class
+        source_oxm_class.const_get(:OXM_CLASS)
+      end
+
+      def oxm_field
+        source_oxm_class.const_get(:OXM_FIELD)
+      end
+
+      def oxm_length
+        source_oxm_class.new.length
+      end
+
+      def source_oxm_class
+        Match.const_get(@source.to_s.split('_').map(&:capitalize).join)
       end
     end
   end
diff --git a/spec/pio/open_flow13/nicira_reg_move_spec.rb b/spec/pio/open_flow13/nicira_reg_move_spec.rb
new file mode 100644
index 00000000..729dfad5
--- /dev/null
+++ b/spec/pio/open_flow13/nicira_reg_move_spec.rb
@@ -0,0 +1,40 @@
+require 'pio/open_flow13/nicira_reg_move'
+
+describe Pio::OpenFlow13::NiciraRegMove do
+  describe '.new' do
+    When(:nicira_reg_move) do
+      Pio::OpenFlow13::NiciraRegMove.new(options)
+    end
+
+    context 'with source: :arp_sender_hardware_address,'\
+            ' destination: :arp_target_hardware_address' do
+      Given(:options) do
+        { source: :arp_sender_hardware_address,
+          destination: :arp_target_hardware_address }
+      end
+
+      Invariant do
+        nicira_reg_move.n_bits ==
+          nicira_reg_move._source[:oxm_length] * 8
+      end
+
+      Then { nicira_reg_move.action_type == 0xffff }
+      Then { nicira_reg_move.action_length == 24 }
+      Then { nicira_reg_move.vendor == 0x2320 }
+      Then { nicira_reg_move.subtype == 6 }
+      Then { nicira_reg_move.n_bits == 48 }
+      Then { nicira_reg_move.source_offset == 0 }
+      Then { nicira_reg_move.destination_offset == 0 }
+      Then { nicira_reg_move.source == :arp_sender_hardware_address }
+      Then { nicira_reg_move._source[:oxm_class] == 0x8000 }
+      Then { nicira_reg_move._source[:oxm_field] == 24 }
+      Then { nicira_reg_move._source[:oxm_hasmask] == 0 }
+      Then { nicira_reg_move._source[:oxm_length] == 6 }
+      Then { nicira_reg_move.destination == :arp_target_hardware_address }
+      Then { nicira_reg_move._destination[:oxm_class] == 0x8000 }
+      Then { nicira_reg_move._destination[:oxm_field] == 25 }
+      Then { nicira_reg_move._destination[:oxm_hasmask] == 0 }
+      Then { nicira_reg_move._destination[:oxm_length] == 6 }
+    end
+  end
+end
diff --git a/spec/pio/open_flow13/nicira_send_out_port_spec.rb b/spec/pio/open_flow13/nicira_send_out_port_spec.rb
new file mode 100644
index 00000000..d8c9b9ab
--- /dev/null
+++ b/spec/pio/open_flow13/nicira_send_out_port_spec.rb
@@ -0,0 +1,29 @@
+require 'pio/open_flow13/nicira_send_out_port'
+
+describe Pio::OpenFlow13::NiciraSendOutPort do
+  describe '.new' do
+    When(:nicira_send_out_port) do
+      Pio::OpenFlow13::NiciraSendOutPort.new(source)
+    end
+
+    context 'with :reg0' do
+      Given(:source) { :reg0 }
+
+      Invariant do
+        nicira_send_out_port.n_bits ==
+          nicira_send_out_port._source[:oxm_length] * 8
+      end
+
+      Then { nicira_send_out_port.action_type == 0xffff }
+      Then { nicira_send_out_port.action_length == 24 }
+      Then { nicira_send_out_port.vendor == 0x2320 }
+      Then { nicira_send_out_port.subtype == 15 }
+      Then { nicira_send_out_port.offset == 0 }
+      Then { nicira_send_out_port.n_bits == 32 }
+      Then { nicira_send_out_port.source == :reg0 }
+      Then { nicira_send_out_port._source[:oxm_class] == 1 }
+      Then { nicira_send_out_port._source[:oxm_field] == 0 }
+      Then { nicira_send_out_port._source[:oxm_length] == 4 }
+    end
+  end
+end