diff --git a/atst/forms/ko_review.py b/atst/forms/ko_review.py
index c50deed7..624202e8 100644
--- a/atst/forms/ko_review.py
+++ b/atst/forms/ko_review.py
@@ -32,7 +32,7 @@ class KOReviewForm(CacheableForm):
     loas = FieldList(
         StringField(
             translate("forms.ko_review.loa"),
-            validators=[Length(min=10), IsNumber(), Optional()],
+            validators=[Optional()],
         )
     )
     custom_clauses = TextAreaField(