diff --git a/ServiceFwUpdate/Ui/ServiceFwUpdateSw/FrmServiceFwUpdateSw.cs b/ServiceFwUpdate/Ui/ServiceFwUpdateSw/FrmServiceFwUpdateSw.cs
index be49218d..2b024bcc 100644
--- a/ServiceFwUpdate/Ui/ServiceFwUpdateSw/FrmServiceFwUpdateSw.cs
+++ b/ServiceFwUpdate/Ui/ServiceFwUpdateSw/FrmServiceFwUpdateSw.cs
@@ -4654,41 +4654,35 @@ namespace Xylem.ServiceFwUpdate.Ui.ServiceFwUpdateSw
         /// <remarks date="2023-Nov-28" author="Thomas Wiedebusch">
         /// - Use installed FW version to decide if LUT is required.
         /// </remarks>
+        /// <remarks date="2024-May-16" author="Thomas Wiedebusch">
+        /// - Uses LUT CRC and file list for installation requirement.
+        /// </remarks>
         private void RestoreLutFile(ProcessState successExitState, ProcessState errorExitState = ProcessState.Error)
         {
             // Remind the invoker being able to generate error messages based on the last state
             _invokerProcessState = _processState;
             InfoProcessActive(lblLutFileCheck, Resources.StrLutFileRestoreActive, false);
 
-            //1. If InstalledFwVersion is below 1.2.xxx a LUT file is NOT required
-            if ((_currentGenesis.Region == "EMEA" 
-                 && _currentGenesis.InstalledFwVersion < MeterLutUpdate.EmeaFwThresholdForLutFile) ||
-                (_currentGenesis.Region == "NA" 
-                 && _currentGenesis.InstalledFwVersion < MeterLutUpdate.NaFwThresholdForLutFile))
-            {
-                InfoProcessSuccess(lblLutFileCheck, Resources.StrLutFileNotNeeded);
-                _processState = successExitState;
-                return;
-            }
-
-            // 2. LUT file is needed but invalid indicated by CRC or cannot be observed in file list
+            // 1. LUT file is needed but invalid indicated by CRC or cannot be observed in file list
             if (   (!string.IsNullOrEmpty(_currentGenesis.LutCrc) 
                     && _currentGenesis.LutCrc.Contains(MeterLutFile.StrLutFileInvalidCrc))
-                || (_readMeterFiles != null 
-                    && !_readMeterFiles.Any(f => f.Contains(MeterLutFile.StrLutMeterFileName))))
+                || (_readMeterFiles != null && !_readMeterFiles.Any(f => f.Contains(MeterLutFile.StrLutMeterFileName))))
             {
                 InfoProcessFailed(lblLutFileCheck, Resources.StrLutFileNotInstalled);
                 _processState = errorExitState;
                 return;
             }
-            // 3. LUT file NOT installed:
+
+            // 2. LUT file NOT installed:
             //    If meter LUT CRC is not set and the meter files do not report the LUT, the meter does not have an
             //    installed LUT
             if ((string.IsNullOrEmpty(_currentGenesis.LutCrc) ||
-                 _currentGenesis.LutCrc.Equals(Constants.StrUnknown)) &&
-                _readMeterFiles != null && !_readMeterFiles.Any(f => f.Contains(MeterLutFile.StrLutMeterFileName)))
+                 _currentGenesis.LutCrc.Equals(Constants.StrUnknown)) 
+                && _readMeterFiles != null 
+                && !_readMeterFiles.Any(f => f.Contains(MeterLutFile.StrLutMeterFileName))
+                && !_readMeterFiles.Any(f => f.Contains(MeterLutFile.StrLutBackupMeterFileName)))
             {
-                // 3. a) LUT file not installed but required by the FW update safe:
+                // 2. a) LUT file not installed but required by the FW update safe:
                 //       If the safe contains a LUT file, the installation of it has failed or it got lost during
                 //       update
                 if (_fwUpdateSafeLutFile != null)
@@ -4698,7 +4692,7 @@ namespace Xylem.ServiceFwUpdate.Ui.ServiceFwUpdateSw
                     return;
                 }
 
-                // 3. b) LUT file not installed and not delivered by the FW update safe
+                // 2. b) LUT file not installed and not delivered by the FW update safe
                 //       This FW version does not require a LUT file
                 InfoProcessSuccess(lblLutFileCheck, Resources.StrLutFileNotNeeded);
                 _processState = successExitState;
@@ -4706,11 +4700,11 @@ namespace Xylem.ServiceFwUpdate.Ui.ServiceFwUpdateSw
                 return;
             }
 
-            // 4. LUT file is installed:
-            // 4.a) Lut file is installed but NOT in the safe:
+            // 3. LUT file is installed:
+            // 3.a) Lut file is installed but NOT in the safe:
             //      If the LUT is not in the safe it cannot be restored or compared to the required content but can
             //      be analyzed and logged
-            // 4.b) LUT file is installed and delivered by the FW update safe:
+            // 3.b) LUT file is installed and delivered by the FW update safe:
             //      On validated installed LUT file in meter this can be compared with the required LUT file
             if (!ReadLogAndCompareMeterLutFile())
             {