diff --git a/build/gcdfirm/sdmc-launcher/ARM9/main.c b/build/gcdfirm/sdmc-launcher/ARM9/main.c
index 50782802..f4abf957 100644
--- a/build/gcdfirm/sdmc-launcher/ARM9/main.c
+++ b/build/gcdfirm/sdmc-launcher/ARM9/main.c
@@ -176,7 +176,7 @@ static BOOL CheckHeader(void)
     OS_TPrintf("AES Encryption      : %s\n", rhs->enable_aes ? "AVAILABLE" : "NOT AVAILABLE");
     if ( rhs->enable_aes )
     {
-        OS_TPrintf("AES Key Type        : %s\n", rhs->developer_encrypt ? "FOR DEVELOPMENT" : "FOR PRODUCT");
+        OS_TPrintf("AES Key Type        : %s\n", rhs->developer_encrypt_old || rhs->exFlags.developer_encrypt ? "FOR DEVELOPMENT" : "FOR PRODUCT");
     }
     // エントリポイント
     OS_TPrintf("ARM9 Entry point    : %08X\n", rhs->main_entry_address);
diff --git a/build/libraries/aes/ARM7/aes_init.c b/build/libraries/aes/ARM7/aes_init.c
index c48f3027..2111b9c7 100644
--- a/build/libraries/aes/ARM7/aes_init.c
+++ b/build/libraries/aes/ARM7/aes_init.c
@@ -102,7 +102,7 @@ void AESi_InitSeedWithRomHeader( ROM_Header* rom_header )
     {
         return;
     }
-    if ( rom_header->s.developer_encrypt )
+    if ( rom_header->s.developer_encrypt_old || rom_header->s.exFlags.developer_encrypt )
     {
         AES_SetKeyA( (AESKey*)rom_header->s.title_name );
     }
diff --git a/build/libraries_sysmenu/sysmenu/ARM9/src/title.c b/build/libraries_sysmenu/sysmenu/ARM9/src/title.c
index 6eab1360..0bbac236 100644
--- a/build/libraries_sysmenu/sysmenu/ARM9/src/title.c
+++ b/build/libraries_sysmenu/sysmenu/ARM9/src/title.c
@@ -956,7 +956,7 @@ static BOOL SYSMi_AuthenticateHeaderWithSign( TitleProperty *pBootTitle, ROM_Hea
 	{
 		// 注：デバグ用コード。
 		// 開発用TSボードで開発版ROMおよび製品版ROMの署名チェックとAESデクリプトをデバグするためのコード
-		if( head->s.developer_encrypt )
+		if( head->s.developer_encrypt_old || head->s.exFlags.developer_encrypt )
 		{
 			// 開発版鍵取得
 			key = g_devPubKey[keynum];
diff --git a/build/libraries_sysmenu/sysmenu/common/src/decryptAES.c b/build/libraries_sysmenu/sysmenu/common/src/decryptAES.c
index adca2c3a..89672213 100644
--- a/build/libraries_sysmenu/sysmenu/common/src/decryptAES.c
+++ b/build/libraries_sysmenu/sysmenu/common/src/decryptAES.c
@@ -138,14 +138,14 @@ BOOL SYSM_InitDecryptAESRegion_W( ROM_Header_Short *hs )
 	}
 
 	// Workに開発/製品情報を格納
-	SYSMi_GetWork()->isDeveloperAESMode = ( hs->developer_encrypt ? TRUE : FALSE );
+	SYSMi_GetWork()->isDeveloperAESMode = ( hs->developer_encrypt_old || hs->exFlags.developer_encrypt ) ? TRUE : FALSE;
 	
 	// カウンタの初期値記録
 	MI_CpuCopy8( hs->main_static_digest, s_initCounterAES[0], AES_BLOCK_SIZE );	// 領域1初期値
 	MI_CpuCopy8( hs->sub_static_digest, s_initCounterAES[1], AES_BLOCK_SIZE );	// 領域2初期値
 
 	// Workに「鍵」or「シードとゲームコード」をセット
-	if( hs->developer_encrypt )
+	if( hs->developer_encrypt_old || hs->exFlags.developer_encrypt )
 	{
 		MI_CpuCopy8( hs->title_name, SYSMi_GetWork()->keyAES, AES_KEY_SIZE );
 	}else
@@ -307,14 +307,14 @@ void SYSM_StartDecryptAESRegion( ROM_Header_Short *hs )
 	}
 
 	// Workに開発/製品情報を格納
-	SYSMi_GetWork()->isDeveloperAESMode = ( hs->developer_encrypt ? TRUE : FALSE );
+	SYSMi_GetWork()->isDeveloperAESMode = ( hs->developer_encrypt_old || hs->exFlags.developer_encrypt ) ? TRUE : FALSE;
 
 	// Workにカウンタの初期値セット
 	MI_CpuCopy8( hs->main_static_digest, SYSMi_GetWork()->counterAES[0], AES_BLOCK_SIZE );	// 領域1初期値
 	MI_CpuCopy8( hs->sub_static_digest, SYSMi_GetWork()->counterAES[1], AES_BLOCK_SIZE );	// 領域2初期値
 
 	// Workに「鍵」or「シードとゲームコード」をセット
-	if( hs->developer_encrypt )
+	if( hs->developer_encrypt_old || hs->exFlags.developer_encrypt )
 	{
 		MI_CpuCopy8( hs->title_name, SYSMi_GetWork()->keyAES, AES_KEY_SIZE );
 	}else
diff --git a/build/nandfirm/menu-launcher/ARM9/main.c b/build/nandfirm/menu-launcher/ARM9/main.c
index cbc84dc5..af977228 100644
--- a/build/nandfirm/menu-launcher/ARM9/main.c
+++ b/build/nandfirm/menu-launcher/ARM9/main.c
@@ -218,7 +218,7 @@ static BOOL CheckHeader(void)
     OS_TPrintf("AES Encryption      : %s\n", rhs->enable_aes ? "AVAILABLE" : "NOT AVAILABLE");
     if ( rhs->enable_aes )
     {
-        OS_TPrintf("AES Key Type        : %s\n", rhs->developer_encrypt ? "FOR DEVELOPMENT" : "FOR PRODUCT");
+        OS_TPrintf("AES Key Type        : %s\n", ( rhs->developer_encrypt_old || rhs->exFlags.developer_encrypt ) ? "FOR DEVELOPMENT" : "FOR PRODUCT");
         if ( rhs->aes_target_size )
         {
             OS_TPrintf("AES address         : %08X\n", rhs->aes_target_rom_offset);
diff --git a/build/nandfirm/sdmc-launcher/ARM9/main.c b/build/nandfirm/sdmc-launcher/ARM9/main.c
index 8e78fe6d..7948c609 100644
--- a/build/nandfirm/sdmc-launcher/ARM9/main.c
+++ b/build/nandfirm/sdmc-launcher/ARM9/main.c
@@ -187,7 +187,7 @@ static BOOL CheckHeader(void)
     OS_TPrintf("AES Encryption      : %s\n", rhs->enable_aes ? "AVAILABLE" : "NOT AVAILABLE");
     if ( rhs->enable_aes )
     {
-        OS_TPrintf("AES Key Type        : %s\n", rhs->developer_encrypt ? "FOR DEVELOPMENT" : "FOR PRODUCT");
+        OS_TPrintf("AES Key Type        : %s\n", ( rhs->developer_encrypt_old || rhs->exFlags.developer_encrypt ) ? "FOR DEVELOPMENT" : "FOR PRODUCT");
     }
     // エントリポイント
     OS_TPrintf("ARM9 Entry point    : %08X\n", rhs->main_entry_address);
diff --git a/build/tools/attach_dummyromheader/attach_dummyromheader.c b/build/tools/attach_dummyromheader/attach_dummyromheader.c
index 84cbe659..382b2b69 100644
--- a/build/tools/attach_dummyromheader/attach_dummyromheader.c
+++ b/build/tools/attach_dummyromheader/attach_dummyromheader.c
@@ -135,7 +135,7 @@ int main(int argc, char *argv[])
 
   // rom_header.s.enable_signature:1;        // enable ROM Header signature
   // rom_header.s.enable_aes:1;              // enable AES encryption
-  // rom_header.s.developer_encrypt:1;       // 開発用セキュリティがかかっている場合に"1"。製品版では"0"
+  // rom_header.s.developer_encrypt_old:1;       // 開発用セキュリティがかかっている場合に"1"。製品版では"0"
 
   //        u32     arm7_scfg_ext;                  // SCFG-EXT
   //        u8      arm7_scfg_clk;                  // SCFG-CLK
diff --git a/docs/format_ROM_Header.xls b/docs/format_ROM_Header.xls
index 99a4f217..a5abb8c5 100644
Binary files a/docs/format_ROM_Header.xls and b/docs/format_ROM_Header.xls differ