Index: firmware/App/Modes/OperationModes.h
===================================================================
diff -u -rd7c545dff2f13dd75ebab0af997c45047c844f7a -r6d4aa77e6b85aa7621a234660f631e725fb1d441
--- firmware/App/Modes/OperationModes.h	(.../OperationModes.h)	(revision d7c545dff2f13dd75ebab0af997c45047c844f7a)
+++ firmware/App/Modes/OperationModes.h	(.../OperationModes.h)	(revision 6d4aa77e6b85aa7621a234660f631e725fb1d441)
@@ -7,8 +7,8 @@
 *
 * @file    OperationModes.h
 *
-* @author  (last)      Jashwant Gantyada
-* @date    (last)      26-Mar-2026
+* @author  (last)      Raghu Kallala
+* @date    (last)      06-Apr-2026
 *
 * @author  (original)  Vinayakam Mani
 * @date    (original)  07-Aug-2024
@@ -63,6 +63,7 @@
 
 BOOL testSetOperationMode( MESSAGE_T *message );                    // Force transition to a given mode (if allowed)
 BOOL testDDOpModePublishIntervalOverride( MESSAGE_T *message );     // DD Opmode publish interval override
+BOOL testSetOperationSubMode( MESSAGE_T *message );                 // Set transition to operation sub mode (if valid)
 
 /**@}*/