diff --git a/tdrs-backend/tdpservice/parsers/schema_defs/header.py b/tdrs-backend/tdpservice/parsers/schema_defs/header.py
index c62d8e6115..0316e67b2a 100644
--- a/tdrs-backend/tdpservice/parsers/schema_defs/header.py
+++ b/tdrs-backend/tdpservice/parsers/schema_defs/header.py
@@ -126,14 +126,7 @@
             startIndex=22,
             endIndex=23,
             required=True,
-            validators=[
-                FieldValidators.isEqual(
-                    "D", error_func=lambda eargs: (
-                        f"HEADER Update Indicator must be set to D instead of {eargs.value}. "
-                        "Please review Exporting Complete Data Using FTANF in the Knowledge Center."
-                    )
-                ),
-            ],
+            validators=[FieldValidators.validateHeaderUpdateIndicator()],
         ),
     ],
 )
diff --git a/tdrs-backend/tdpservice/parsers/validators/category2.py b/tdrs-backend/tdpservice/parsers/validators/category2.py
index a2fdc62c4a..b279a8ac0f 100644
--- a/tdrs-backend/tdpservice/parsers/validators/category2.py
+++ b/tdrs-backend/tdpservice/parsers/validators/category2.py
@@ -212,3 +212,13 @@ def validateRace():
                 f"{format_error_context(eargs)} {eargs.value} is not greater than or equal to 0 "
                 "or smaller than or equal to 2."
         )
+
+    @staticmethod
+    def validateHeaderUpdateIndicator():
+        """Validate the header update indicator."""
+        return make_validator(
+            ValidatorFunctions.isEqual('D'),
+            lambda eargs:
+                f"HEADER Update Indicator must be set to D instead of {eargs.value}. "
+                "Please review Exporting Complete Data Using FTANF in the Knowledge Center."
+        )
\ No newline at end of file