Index: firmware/App/Modes/FPModes/ModeGenPermeateDefeatured.c
===================================================================
diff -u -r47a7b0fce13cf38919932a8662c378f4f6a8b9f3 -rbadf6cf12c8ee15d856a195dfacb8f84360f8e96
--- firmware/App/Modes/FPModes/ModeGenPermeateDefeatured.c	(.../ModeGenPermeateDefeatured.c)	(revision 47a7b0fce13cf38919932a8662c378f4f6a8b9f3)
+++ firmware/App/Modes/FPModes/ModeGenPermeateDefeatured.c	(.../ModeGenPermeateDefeatured.c)	(revision badf6cf12c8ee15d856a195dfacb8f84360f8e96)
@@ -333,4 +333,62 @@
     return result;
 }
 
+/*********************************************************************//**
+ * @brief
+ * The testValidateGenPDefeaturedChangeReq function validate whether
+ * requested sub mode change is legal or not.
+ * @details \b Inputs: none
+ * @details \b Outputs: none
+ * @param newSubMode the enumerated sub state of the mode.
+ * @return TRUE if request is legal, FALSE if not.
+ *************************************************************************/
+BOOL testValidateGenPDefeaturedChangeReq( U32 newSubMode )
+{
+    BOOL result = FALSE;
+
+    if ( newSubMode < NUM_OF_FP_GENP_DEF_MODE_STATES )
+    {
+        switch ( newSubMode )
+        {
+            case FP_GENP_DEF_SUPPLY_WATER:
+                result = TRUE;
+                break;
+
+            // TODO update once pause state is implemented
+            case FP_GENP_DEF_PAUSED:
+            default:
+                break;
+        }
+    }
+
+    return result;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The testSignalNewGenPDefeaturedSubMode function requests transition
+ * to a new defeatured Gen Permeate sub mode.
+ * @details \b Inputs: none
+ * @details \b Outputs: none
+ * @param newSubMode the enumerated sub state of the mode.
+ * @return none
+ *************************************************************************/
+void testSignalNewGenPDefeaturedSubMode( U32 newSubMode )
+{
+    if ( newSubMode < NUM_OF_FP_GENP_DEF_MODE_STATES )
+    {
+        genPermeateDefState = (FP_GENP_DEF_MODE_STATE_T)newSubMode;
+        // handle the prerequisite if any
+        switch ( newSubMode )
+        {
+            // Any of these state require no special handling
+            case FP_GENP_DEF_SUPPLY_WATER:
+            case FP_GENP_DEF_PAUSED:
+            default:
+                break;
+        }
+        setModeGenPDefTransition( genPermeateDefState );
+    }
+}
+
 /**@}*/