Index: firmware/App/Modes/FPModes/FPOperationModes.h
===================================================================
diff -u -r0629bf55079c4ad0fa3b44091d5f3618e51b7a2b -rb25a4928766392152694b1304565f876fd38b39a
--- firmware/App/Modes/FPModes/FPOperationModes.h	(.../FPOperationModes.h)	(revision 0629bf55079c4ad0fa3b44091d5f3618e51b7a2b)
+++ firmware/App/Modes/FPModes/FPOperationModes.h	(.../FPOperationModes.h)	(revision b25a4928766392152694b1304565f876fd38b39a)
@@ -7,8 +7,8 @@
 *
 * @file    FPOperationModes.h
 *
-* @author  (last)      “rkallala”
-* @date    (last)      15-Jan-2026
+* @author  (last)      Raghu Kallala
+* @date    (last)      30-Mar-2026
 *
 * @author  (original)  Michael Garthwaite
 * @date    (original)  08-Sep-2025
@@ -58,7 +58,7 @@
 // ********** public function prototypes **********
 
 void initFPOperationModes( void );                                    // Initialize this unit
-void execFPOperationModes( void );
+void execFPOperationModes( void );                                    // Execute the FP operation mode state machine (scheduled periodic call)
 
 void requestNewFPOperationMode( FP_OP_MODE_T newMode );               // Request a transition to a new operation mode
 FP_OP_MODE_T getCurrentFPOperationMode( void );                       // Get the current operation mode
@@ -76,6 +76,7 @@
 BOOL testSetGeneratePermeateSignal( MESSAGE_T *message );             // Set start stop generate permeate.
 BOOL testGetFPDefeaturedStatus( MESSAGE_T *message );                 // Send a response message with FP defeatured status payload
 BOOL testGetFPBoostPumpInstallStatus( MESSAGE_T *message );           // Send a response message with FP boost pump installation status payload
+BOOL testSetFPOperationSubMode( MESSAGE_T *message );                 // Set operation sub mode override
 
 /**@}*/