Index: firmware/App/Modes/OperationModes.h
===================================================================
diff -u -rce64b7e15824641a6a6465c28eec5d8ec593f110 -r0e0fc7fbbc571a76deb8ddc6e6382bfa58598406
--- firmware/App/Modes/OperationModes.h	(.../OperationModes.h)	(revision ce64b7e15824641a6a6465c28eec5d8ec593f110)
+++ firmware/App/Modes/OperationModes.h	(.../OperationModes.h)	(revision 0e0fc7fbbc571a76deb8ddc6e6382bfa58598406)
@@ -40,6 +40,24 @@
     U32 subMode;                         ///< Current sub-mode of current operating mode
 } OP_MODE_PAYLOAD_T;
 
+/// Payload record structure for operation status events.
+typedef enum Op_Status_Fields
+{
+  OPERATION_MODE = 0,                   ///< Current Operation mode
+  SUB_MODE,                             ///< Current sub mode
+  SUB_STATE,                            ///< Current sub state where applicable
+  RESERVED,                             ///< Reserved 8-bit space used to uphold 32-bit payload sizes.
+  NUM_OF_OP_STATUS_TYPE
+} OP_STATUS_T;
+
+#pragma pack(push, 1)
+
+typedef struct
+{
+    U08 OpStatus[NUM_OF_OP_STATUS_TYPE];
+} OP_STATUS_EVENT_PAYLOAD_T;
+
+#pragma pack(pop)
 // ********** public function prototypes **********
 
 void initOperationModes( void );                                    // Initialize this module