diff --git a/source/App/EncoderApp/EncApp.cpp b/source/App/EncoderApp/EncApp.cpp
index 1ceffd2c2fe46f8eda7f06d5e842a1789dfd7b9a..bc425bc6d6775f1d18f7343c4025894d4e09d767 100644
--- a/source/App/EncoderApp/EncApp.cpp
+++ b/source/App/EncoderApp/EncApp.cpp
@@ -984,10 +984,8 @@ void EncApp::xInitLibCfg()
   m_cEncLib.setVerPhaseDenMinus1ReducedResolution                (m_piVerPhaseDenMinus1ReducedResolution);
   m_cEncLib.setMCTSEncConstraint                                 ( m_MCTSEncConstraint);
   m_cEncLib.setMasteringDisplaySEI                               ( m_masteringDisplay );
-#if U0033_ALTERNATIVE_TRANSFER_CHARACTERISTICS_SEI
   m_cEncLib.setSEIAlternativeTransferCharacteristicsSEIEnable    ( m_preferredTransferCharacteristics>=0     );
   m_cEncLib.setSEIPreferredTransferCharacteristics               ( uint8_t(m_preferredTransferCharacteristics) );
-#endif
   // film grain charcteristics
   m_cEncLib.setFilmGrainCharactersticsSEIEnabled                 (m_fgcSEIEnabled);
   m_cEncLib.setFilmGrainCharactersticsSEICancelFlag              (m_fgcSEICancelFlag);
diff --git a/source/App/EncoderApp/EncAppCfg.cpp b/source/App/EncoderApp/EncAppCfg.cpp
index 9564ee41a67f57d9d39f32f5cd622f70d96da040..679506264242829ab2f12f0ad58ba7b5fd228215 100644
--- a/source/App/EncoderApp/EncAppCfg.cpp
+++ b/source/App/EncoderApp/EncAppCfg.cpp
@@ -1331,9 +1331,7 @@ bool EncAppCfg::parseCfg( int argc, char* argv[] )
   ("SEIMasteringDisplayMinLuminance",                 m_masteringDisplay.minLuminance,                      0u, "Specifies the mastering display minimum luminance value in units of 1/10000 candela per square metre (32-bit code value)")
   ("SEIMasteringDisplayPrimaries",                    cfg_DisplayPrimariesCode,       cfg_DisplayPrimariesCode, "Mastering display primaries for all three colour planes in CIE xy coordinates in increments of 1/50000 (results in the ranges 0 to 50000 inclusive)")
   ("SEIMasteringDisplayWhitePoint",                   cfg_DisplayWhitePointCode,     cfg_DisplayWhitePointCode, "Mastering display white point CIE xy coordinates in normalised increments of 1/50000 (e.g. 0.333 = 16667)")
-#if U0033_ALTERNATIVE_TRANSFER_CHARACTERISTICS_SEI
   ("SEIPreferredTransferCharacteristics",              m_preferredTransferCharacteristics,                   -1, "Value for the preferred_transfer_characteristics field of the Alternative transfer characteristics SEI which will override the corresponding entry in the VUI. If negative, do not produce the respective SEI message")
-#endif
 
   ("SEIErpEnabled",                                   m_erpSEIEnabled,                                   false, "Control generation of equirectangular projection SEI messages")
 ("SEIErpCancelFlag", m_erpSEICancelFlag, true, "Indicate that equirectangular projection SEI message cancels the persistence or follows")
@@ -4704,9 +4702,7 @@ bool EncAppCfg::xCheckParameter()
 
   xConfirmPara(m_log2ParallelMergeLevel < 2, "Log2ParallelMergeLevel should be larger than or equal to 2");
   xConfirmPara(m_log2ParallelMergeLevel > m_uiCTUSize, "Log2ParallelMergeLevel should be less than or equal to CTU size");
-#if U0033_ALTERNATIVE_TRANSFER_CHARACTERISTICS_SEI
   xConfirmPara(m_preferredTransferCharacteristics > 255, "transfer_characteristics_idc should not be greater than 255.");
-#endif
   xConfirmPara( unsigned(m_ImvMode) > 1, "ImvMode exceeds range (0 to 1)" );
   if (m_AffineAmvr)
   {
diff --git a/source/App/EncoderApp/EncAppCfg.h b/source/App/EncoderApp/EncAppCfg.h
index a9692419ac4fa5092d815e1901746d7946e6e4d1..8f34703e10c1cc095914a4f53f1f61704b587835 100644
--- a/source/App/EncoderApp/EncAppCfg.h
+++ b/source/App/EncoderApp/EncAppCfg.h
@@ -527,9 +527,7 @@ protected:
   int       m_doSEITransformType;
   bool      m_parameterSetsInclusionIndicationSEIEnabled;
   int       m_selfContainedClvsFlag;
-#if U0033_ALTERNATIVE_TRANSFER_CHARACTERISTICS_SEI
   int       m_preferredTransferCharacteristics;
-#endif
 
   // film grain characterstics sei
   bool      m_fgcSEIEnabled;
diff --git a/source/Lib/CommonLib/SEI.cpp b/source/Lib/CommonLib/SEI.cpp
index 201bc388e1da7749cc8e0b90df126500e68e009a..ad3758229242595a86bca7c9ba6ce0e777820d62 100644
--- a/source/Lib/CommonLib/SEI.cpp
+++ b/source/Lib/CommonLib/SEI.cpp
@@ -454,9 +454,7 @@ const char *SEI::getSEIMessageString(SEI::PayloadType payloadType)
     case SEI::DECODED_PICTURE_HASH:                 return "Decoded picture hash";
     case SEI::DEPENDENT_RAP_INDICATION:             return "Dependent RAP indication";
     case SEI::MASTERING_DISPLAY_COLOUR_VOLUME:      return "Mastering display colour volume";
-#if U0033_ALTERNATIVE_TRANSFER_CHARACTERISTICS_SEI
     case SEI::ALTERNATIVE_TRANSFER_CHARACTERISTICS: return "Alternative transfer characteristics";
-#endif
     case SEI::CONTENT_LIGHT_LEVEL_INFO:             return "Content light level information";
     case SEI::AMBIENT_VIEWING_ENVIRONMENT:          return "Ambient viewing environment";
     case SEI::CONTENT_COLOUR_VOLUME:                return "Content colour volume";
diff --git a/source/Lib/CommonLib/SEI.h b/source/Lib/CommonLib/SEI.h
index 3d64f7b3a9eac989a83a0adc314ada9c446c3866..174d8b289639b254e5e1654cf45b75a583cbafac 100644
--- a/source/Lib/CommonLib/SEI.h
+++ b/source/Lib/CommonLib/SEI.h
@@ -840,7 +840,6 @@ void xTraceSEIHeader();
 void xTraceSEIMessageType( SEI::PayloadType payloadType );
 #endif
 
-#if U0033_ALTERNATIVE_TRANSFER_CHARACTERISTICS_SEI
 class SEIAlternativeTransferCharacteristics : public SEI
 {
 public:
@@ -853,7 +852,6 @@ public:
 
   uint32_t m_preferredTransferCharacteristics;
 };
-#endif
 class SEIUserDataRegistered : public SEI
 {
 public:
diff --git a/source/Lib/CommonLib/TypeDef.h b/source/Lib/CommonLib/TypeDef.h
index 75bb29d30f03e844ac5b527fe619c0c551c11b76..817f823097432d99542140a02a9fe1c33a057ff0 100644
--- a/source/Lib/CommonLib/TypeDef.h
+++ b/source/Lib/CommonLib/TypeDef.h
@@ -165,7 +165,6 @@ typedef std::pair<int, int>  TrCost;
 // ====================================================================================================================
 
 #define DECODER_CHECK_SUBSTREAM_AND_SLICE_TRAILING_BYTES  1 ///< TODO: integrate this macro into a broader conformance checking system.
-#define U0033_ALTERNATIVE_TRANSFER_CHARACTERISTICS_SEI    1 ///< Alternative transfer characteristics SEI message (JCTVC-U0033, with syntax naming from V1005)
 #define X0038_LAMBDA_FROM_QP_CAPABILITY                   1 ///< This approach derives lambda from QP+QPoffset+QPoffset2. QPoffset2 is derived from QP+QPoffset using a linear model that is clipped between 0 and 3.
                                                             // To use this capability enable config parameter LambdaFromQpEnable
 
diff --git a/source/Lib/DecoderLib/SEIread.cpp b/source/Lib/DecoderLib/SEIread.cpp
index 402b8eb6c7b83eae3c17c8787fed4dbe8cd79f82..8a2aa27c910e60fb273fce7d8634167b5fe16ee6 100644
--- a/source/Lib/DecoderLib/SEIread.cpp
+++ b/source/Lib/DecoderLib/SEIread.cpp
@@ -330,12 +330,10 @@ void SEIReader::xReadSEImessage(SEIMessages& seis, const NalUnitType nalUnitType
       sei = new SEIMasteringDisplayColourVolume;
       xParseSEIMasteringDisplayColourVolume((SEIMasteringDisplayColourVolume&) *sei, payloadSize, pDecodedMessageOutputStream);
       break;
-#if U0033_ALTERNATIVE_TRANSFER_CHARACTERISTICS_SEI
     case SEI::ALTERNATIVE_TRANSFER_CHARACTERISTICS:
       sei = new SEIAlternativeTransferCharacteristics;
       xParseSEIAlternativeTransferCharacteristics((SEIAlternativeTransferCharacteristics&) *sei, payloadSize, pDecodedMessageOutputStream);
       break;
-#endif
     case SEI::EQUIRECTANGULAR_PROJECTION:
       sei = new SEIEquirectangularProjection;
       xParseSEIEquirectangularProjection((SEIEquirectangularProjection&) *sei, payloadSize, pDecodedMessageOutputStream);
@@ -1763,7 +1761,6 @@ void SEIReader::xParseSEIMasteringDisplayColourVolume(SEIMasteringDisplayColourV
   sei_read_code( pDecodedMessageOutputStream, 32, code, "mdcv_min_display_mastering_luminance" ); sei.values.minLuminance = code;
 }
 
-#if U0033_ALTERNATIVE_TRANSFER_CHARACTERISTICS_SEI
 void SEIReader::xParseSEIAlternativeTransferCharacteristics(SEIAlternativeTransferCharacteristics& sei, uint32_t payloadSize, std::ostream* pDecodedMessageOutputStream)
 {
   uint32_t code;
@@ -1771,7 +1768,6 @@ void SEIReader::xParseSEIAlternativeTransferCharacteristics(SEIAlternativeTransf
 
   sei_read_code(pDecodedMessageOutputStream, 8, code, "preferred_transfer_characteristics"); sei.m_preferredTransferCharacteristics = code;
 }
-#endif
 void SEIReader::xParseSEIUserDataRegistered(SEIUserDataRegistered& sei, uint32_t payloadSize, std::ostream *pDecodedMessageOutputStream)
 {
   output_sei_message_header(sei, pDecodedMessageOutputStream, payloadSize);
diff --git a/source/Lib/DecoderLib/SEIread.h b/source/Lib/DecoderLib/SEIread.h
index 11c8f0ff7bfc0ceb00a928576fbd55210c0cd316..a849fabfef076f3613d980e8cc6576954c10b0dd 100644
--- a/source/Lib/DecoderLib/SEIread.h
+++ b/source/Lib/DecoderLib/SEIread.h
@@ -79,9 +79,7 @@ protected:
   void xParseSEIParameterSetsInclusionIndication(SEIParameterSetsInclusionIndication& sei, uint32_t payloadSize,                std::ostream* pDecodedMessageOutputStream);
   void xParseSEIMasteringDisplayColourVolume  (SEIMasteringDisplayColourVolume& sei,  uint32_t payloadSize,                     std::ostream *pDecodedMessageOutputStream);
   void xParseSEIAnnotatedRegions              (SEIAnnotatedRegions& sei,              uint32_t payloadSize,                     std::ostream *pDecodedMessageOutputStream);
-#if U0033_ALTERNATIVE_TRANSFER_CHARACTERISTICS_SEI
   void xParseSEIAlternativeTransferCharacteristics(SEIAlternativeTransferCharacteristics& sei,              uint32_t payLoadSize,                     std::ostream *pDecodedMessageOutputStream);
-#endif
   void xParseSEIEquirectangularProjection     (SEIEquirectangularProjection &sei,     uint32_t payloadSize,                     std::ostream *pDecodedMessageOutputStream);
   void xParseSEISphereRotation                (SEISphereRotation &sei,                uint32_t payloadSize,                     std::ostream *pDecodedMessageOutputStream);
   void xParseSEIOmniViewport                  (SEIOmniViewport& sei,                  uint32_t payloadSize,                     std::ostream *pDecodedMessageOutputStream);
diff --git a/source/Lib/EncoderLib/EncCfg.h b/source/Lib/EncoderLib/EncCfg.h
index 4757f0d6431ff1e4921178126429bd72853d1aec..2667cf2247bdf1d720f6fdae32599bef7fcb1bb0 100644
--- a/source/Lib/EncoderLib/EncCfg.h
+++ b/source/Lib/EncoderLib/EncCfg.h
@@ -658,10 +658,8 @@ protected:
   int                   m_verPhaseDenMinus1ReducedResolution;
   bool      m_MCTSEncConstraint;
   SEIMasteringDisplay m_masteringDisplay;
-#if U0033_ALTERNATIVE_TRANSFER_CHARACTERISTICS_SEI
   bool      m_alternativeTransferCharacteristicsSEIEnabled;
   uint8_t     m_preferredTransferCharacteristics;
-#endif
 
   bool                    m_siiSEIEnabled;
   uint32_t                m_siiSEINumUnitsInShutterInterval;
@@ -2080,12 +2078,10 @@ public:
   void  setMCTSEncConstraint(bool b)                                 { m_MCTSEncConstraint = b; }
   bool  getMCTSEncConstraint()                                       { return m_MCTSEncConstraint; }
   void  setMasteringDisplaySEI(const SEIMasteringDisplay &src)       { m_masteringDisplay = src; }
-#if U0033_ALTERNATIVE_TRANSFER_CHARACTERISTICS_SEI
   void  setSEIAlternativeTransferCharacteristicsSEIEnable( bool b)   { m_alternativeTransferCharacteristicsSEIEnabled = b;    }
   bool  getSEIAlternativeTransferCharacteristicsSEIEnable( ) const   { return m_alternativeTransferCharacteristicsSEIEnabled; }
   void  setSEIPreferredTransferCharacteristics(uint8_t v)              { m_preferredTransferCharacteristics = v;    }
   uint8_t getSEIPreferredTransferCharacteristics() const               { return m_preferredTransferCharacteristics; }
-#endif
   const SEIMasteringDisplay &getMasteringDisplaySEI() const          { return m_masteringDisplay; }
   // film grain SEI
   void  setFilmGrainCharactersticsSEIEnabled (bool b)                { m_fgcSEIEnabled = b; }
diff --git a/source/Lib/EncoderLib/EncGOP.cpp b/source/Lib/EncoderLib/EncGOP.cpp
index 17c43c8040d031d21a570c9f6525aeb0c958fc4a..857dbb834b7ece67bfb3eb519de6ee16fcc5edab 100644
--- a/source/Lib/EncoderLib/EncGOP.cpp
+++ b/source/Lib/EncoderLib/EncGOP.cpp
@@ -705,14 +705,12 @@ void EncGOP::xCreateIRAPLeadingSEIMessages (SEIMessages& seiMessages, const SPS
     seiMessages.push_back(sei);
   }
 
-#if U0033_ALTERNATIVE_TRANSFER_CHARACTERISTICS_SEI
   if(m_pcCfg->getSEIAlternativeTransferCharacteristicsSEIEnable())
   {
     SEIAlternativeTransferCharacteristics *seiAlternativeTransferCharacteristics = new SEIAlternativeTransferCharacteristics;
     m_seiEncoder.initSEIAlternativeTransferCharacteristics(seiAlternativeTransferCharacteristics);
     seiMessages.push_back(seiAlternativeTransferCharacteristics);
   }
-#endif
   if (m_pcCfg->getErpSEIEnabled())
   {
     SEIEquirectangularProjection *sei = new SEIEquirectangularProjection;
diff --git a/source/Lib/EncoderLib/SEIEncoder.cpp b/source/Lib/EncoderLib/SEIEncoder.cpp
index 807b7ffd1bb8adfbd364b32a038e29d267e14f60..2da008cf20471e89bd375dd877c01d6fe1089266 100644
--- a/source/Lib/EncoderLib/SEIEncoder.cpp
+++ b/source/Lib/EncoderLib/SEIEncoder.cpp
@@ -780,7 +780,6 @@ bool SEIEncoder::initSEIAnnotatedRegions(SEIAnnotatedRegions* SEIAnnoReg, int cu
 }
 
 
-#if U0033_ALTERNATIVE_TRANSFER_CHARACTERISTICS_SEI
 void SEIEncoder::initSEIAlternativeTransferCharacteristics(SEIAlternativeTransferCharacteristics *seiAltTransCharacteristics)
 {
   CHECK(!(m_isInitialized), "Unspecified error");
@@ -788,7 +787,6 @@ void SEIEncoder::initSEIAlternativeTransferCharacteristics(SEIAlternativeTransfe
   //  Set SEI message parameters read from command line options
   seiAltTransCharacteristics->m_preferredTransferCharacteristics = m_pcCfg->getSEIPreferredTransferCharacteristics();
 }
-#endif
 void SEIEncoder::initSEIFilmGrainCharacteristics(SEIFilmGrainCharacteristics *seiFilmGrain)
 {
   CHECK(!(m_isInitialized), "Unspecified error");
diff --git a/source/Lib/EncoderLib/SEIEncoder.h b/source/Lib/EncoderLib/SEIEncoder.h
index 269c12b94fb8f0f6e8fb0cc1135e968850824918..135badf23388f2992976b09bc77d6aba145b3085 100644
--- a/source/Lib/EncoderLib/SEIEncoder.h
+++ b/source/Lib/EncoderLib/SEIEncoder.h
@@ -65,9 +65,7 @@ public:
   void initSEIDependentRAPIndication(SEIDependentRAPIndication *sei);
   void initSEIExtendedDrapIndication(SEIExtendedDrapIndication *sei);
   void initSEIBufferingPeriod(SEIBufferingPeriod *sei, bool noLeadingPictures);
-#if U0033_ALTERNATIVE_TRANSFER_CHARACTERISTICS_SEI
   void initSEIAlternativeTransferCharacteristics(SEIAlternativeTransferCharacteristics *sei);
-#endif
   void initSEIScalableNesting(SEIScalableNesting *scalableNestingSEI, SEIMessages &nestedSEIs, const std::vector<int> &targetOLSs, const std::vector<int> &targetLayers, const std::vector<uint16_t> &subpictureIDs, uint16_t maxSubpicIdInPic);
   void initDecodedPictureHashSEI(SEIDecodedPictureHash *sei, PelUnitBuf& pic, std::string &rHashString, const BitDepths &bitDepths);
   void initSEIErp(SEIEquirectangularProjection *sei);
diff --git a/source/Lib/EncoderLib/SEIwrite.cpp b/source/Lib/EncoderLib/SEIwrite.cpp
index 3517907dbd5c6d455a4b0fb10fb0ffc5674e83ed..fab0e1e663f0433b95f594fb7e7eff7f76c292dd 100644
--- a/source/Lib/EncoderLib/SEIwrite.cpp
+++ b/source/Lib/EncoderLib/SEIwrite.cpp
@@ -92,11 +92,9 @@ void SEIWriter::xWriteSEIpayloadData(OutputBitstream &bs, const SEI& sei, HRD &h
   case SEI::MASTERING_DISPLAY_COLOUR_VOLUME:
     xWriteSEIMasteringDisplayColourVolume(*static_cast<const SEIMasteringDisplayColourVolume*>(&sei));
     break;
-#if U0033_ALTERNATIVE_TRANSFER_CHARACTERISTICS_SEI
   case SEI::ALTERNATIVE_TRANSFER_CHARACTERISTICS:
     xWriteSEIAlternativeTransferCharacteristics(*static_cast<const SEIAlternativeTransferCharacteristics*>(&sei));
     break;
-#endif
   case SEI::EQUIRECTANGULAR_PROJECTION:
     xWriteSEIEquirectangularProjection(*static_cast<const SEIEquirectangularProjection*>(&sei));
     break;
@@ -783,12 +781,10 @@ void SEIWriter::xWriteByteAlign()
   }
 }
 
-#if U0033_ALTERNATIVE_TRANSFER_CHARACTERISTICS_SEI
 void SEIWriter::xWriteSEIAlternativeTransferCharacteristics(const SEIAlternativeTransferCharacteristics& sei)
 {
   WRITE_CODE(sei.m_preferredTransferCharacteristics, 8, "preferred_transfer_characteristics");
 }
-#endif
 
 void SEIWriter::xWriteSEIEquirectangularProjection(const SEIEquirectangularProjection &sei)
 {
diff --git a/source/Lib/EncoderLib/SEIwrite.h b/source/Lib/EncoderLib/SEIwrite.h
index 6e689440065f1323b1eccb219bc9d83877dd9195..8d3ec33cdf30a0f2af137da2b3043442869104bf 100644
--- a/source/Lib/EncoderLib/SEIwrite.h
+++ b/source/Lib/EncoderLib/SEIwrite.h
@@ -67,9 +67,7 @@ protected:
   void xWriteSEIDisplayOrientation(const SEIDisplayOrientation& sei);
   void xWriteSEIParameterSetsInclusionIndication(const SEIParameterSetsInclusionIndication& sei);
   void xWriteSEIMasteringDisplayColourVolume( const SEIMasteringDisplayColourVolume& sei);
-#if U0033_ALTERNATIVE_TRANSFER_CHARACTERISTICS_SEI
   void xWriteSEIAlternativeTransferCharacteristics(const SEIAlternativeTransferCharacteristics& sei);
-#endif
   void xWriteSEIEquirectangularProjection         (const SEIEquirectangularProjection &sei);
   void xWriteSEISphereRotation                    (const SEISphereRotation &sei);
   void xWriteSEIOmniViewport                      (const SEIOmniViewport& sei);