I would use a consistent Tag value in each CC that needs to be wiped by the macro. For example, set the Tag property to "Annual" for the plain text CCs you want to wipe.
The macro that then wipes those ones (at its simplest) would be
Code:
Sub DeciduousCCs()
Dim aCC As ContentControl
For Each aCC In ActiveDocument.SelectContentControlsByTag("Annual")
aCC.Range.Text = ""
Next aCC
End Sub
You might need to complicate this if it doesn't work with the CC types in your document.