diff --git a/tc/tctbziv.uml b/tc/tctbziv.uml
index cc1a1f2f0..8909bdd7d 100755
--- a/tc/tctbziv.uml
+++ b/tc/tctbziv.uml
@@ -44,7 +44,6 @@ END
 NUMBER F_NORMA 2
 BEGIN
   PROMPT 2 7 "Codice Norma "
-	CHECKTYPE REQUIRED
   VALIDATE FIXLEN_FUNC 2
   FIELD S7
   FLAG "Z"