Clear cell contents not working based on menu selection

[Galley]

Scenario: The contents of a validated list ("B1") changes depending on the selection made in another validated list ("A1"). If the user makes a selection in B1, but then goes back to change the selection in A1, the selection in B1 should be cleared to prevent a mismatch.

I have used the following procedure in the past on a much simpler form.

Private Sub Worksheet_Change(ByVal Target As Range) 
     
    If Target.Cells.Count > 1 Then Exit Sub 
     
    If Not Intersect(Target, Range("A1")) Is Nothing Then 
        Range("B1").ClearContents 
    End If 
     
End Sub

I am using the following code to dynamically change the interface color, and hidden and locked states of several fields, based on the selected item in E11. Everything works as intended.

Private Sub Worksheet_Change(ByVal Target As Range)

If Target.Cells.Count > 1 Then Exit Sub

If Intersect(Target, Range("E11")) Is Nothing Then Exit Sub

'########################################'

'If user-selected Data Type = nothing
If Target = "" Then

'Unprotects cells
   Unprotect Password:="SDR02"
    
'Clears previously set borders
   ClearBorders
   
'Clears previously entered data
   ClearContents
    
'Changes user input area to the default color and enables applicable fields.
   DefaultInterface
   
'Protects cells
   Protect Password:="SDR02"
      
'########################################'

'If user-selected Data Type = Labor
ElseIf Target = "Labor" Then

'Unprotects cells
   Unprotect Password:="SDR02"
   
'Unlocks applicable cells
    Range("C13:E13,G13,C15:E15,G15").Locked = False
    
'Locks non-applicable cells
   Range("C17,E17,G17").Locked = True
     
'Clears previously set borders
   ClearBorders
   
'Clears previously entered data
   ClearContents
   
'Changes user input area to blue and enables applicable fields.
   BlueInterface
   
'Selects default field
   Range("C13").Activate
   
'Protects cells
   Protect Password:="SDR02"

'########################################'

'If user-selected Data Type = Materials
ElseIf Target = "Materials" Then

'Unprotects cells
   Unprotect Password:="SDR02"
   
'Unlocks applicable cells
    Range("C17,E17").Locked = False
    
'Locks non-applicable cells
   Range("C13:E13,G13,C15:E15,G15,G17").Locked = True
   
'Clears previously set borders
    ClearBorders
    
'Clears previously entered data
   ClearContents
    
'Changes user input area to purple and enables applicable fields.
   PurpleInterface
   
'Selects default field
   Range("C17").Activate
   
'Protects cells
   Protect Password:="SDR02"
   
'########################################'
   
'If user-selected Data Type = Inspected Product
ElseIf Target = "Inspected Product" Then

'Unprotects cells
   Unprotect Password:="SDR02"
   
'Unlocks applicable cells
    Range("G17").Locked = False
    
'Locks non-applicable cells
   Range("C13:E13,G13,C15:E15,G15,C17,E17").Locked = True
   
'Clears previously set borders
    ClearBorders
    
'Clears previously entered data
   ClearContents
    
'Changes user input area to aqua and enables applicable fields.
    AquaInterface
    
'Selects default field
   Range("G17").Activate
 
'Protects cells
   Protect Password:="SDR02"
       
    End If
    
End Sub

What I would like to be able to do is call the DefaultInterface procedure whenever the selection in C11 changes. C13:E13 and C15:E15 display one of three validated lists, based on the selection in C11.
I have tried the first method, but it does not work. I have also tried detecting that the Target was not C11 or E11, but that messed with my interface changing procedures. Am I trying to do much with a change event? Thanks!

 

[Galley]

What I ended up doing was locking C11 when a selection has been made in C13. C11 is required for several VLOOKUP procedures, so locking was the best option. The user has no reason to change the selection in C11 after the initial selection.

Thanks for looking!