diff --git a/backend/api/v1/modules/a76/items/common/common_validators.py b/backend/api/v1/modules/a76/items/common/common_validators.py
index 8edc00a8..377136dd 100644
--- a/backend/api/v1/modules/a76/items/common/common_validators.py
+++ b/backend/api/v1/modules/a76/items/common/common_validators.py
@@ -1,3 +1,4 @@
+from sqlalchemy import func
 from core.exceptions import ErrorCollector
 from ..line_items import models
 from sqlalchemy.orm import Session
@@ -22,4 +23,18 @@ def item_exists(
 
     if item_exists:
         return item_exists
-    return None
\ No newline at end of file
+    return None
+
+def count_items(
+    db: Session,
+    invoice_id: int,
+    tenant_id: int,
+    company_id: int    
+):
+    count = db.query(func.count()).select_from(models.Item).filter(
+        models.Item.invoice_id == invoice_id,
+        models.Item.tenant_id == tenant_id,
+        models.Item.company_id == company_id,
+    ).scalar()
+
+    return count
\ No newline at end of file
diff --git a/backend/api/v1/modules/a76/items/imports/temporary/validators/create.py b/backend/api/v1/modules/a76/items/imports/temporary/validators/create.py
index 9d9fde47..d270c76b 100644
--- a/backend/api/v1/modules/a76/items/imports/temporary/validators/create.py
+++ b/backend/api/v1/modules/a76/items/imports/temporary/validators/create.py
@@ -1,10 +1,6 @@
-import logging
-from typing import Optional, List, Tuple
-from fastapi import HTTPException
-from sqlalchemy import and_, or_
-from sqlalchemy.exc import IntegrityError
-from sqlalchemy.orm import Session, joinedload
-from api.v1.modules.a76.invoices.common.common_validators import invoice_exists
+from sqlalchemy import func, exists
+from sqlalchemy.orm import Session
+from ....common.common_validators import count_items
 from core.exceptions import ErrorCollector
 
 from ....line_items.models import LineItem
@@ -21,10 +17,81 @@ from .common import validate_common
 
 def validate_create(
     db: Session,
-    line: Item,
+    line: LineItem,
     tenant_id: int,
     company_id: int,
     errors: ErrorCollector,
     line_number: int,
 ):
+    item_header: Item = db.query(Item).filter(Item.id == line.item_id).first()
+    fa_line: FaLineItem = db.query(FaLineItem).filter(FaLineItem.id == line.id).first()
+
+    if not line.class_id:
+        errors.add_required_error(field=f"line[{line_number}].class_id")
+
+    if not line.quantity.quantity or line.quantity.quantity <= 0:
+        errors.add_required_error(field=f"line[{line_number}].quantity.quantity")
+
+    # TODO: Añadir validacion SSisGen:CalcularCostoUnitarioEnBaseAValorTotalScaf <-- de la tabla de preferencias de el sistema
+    # if SSisGen:CalcularCostoUnitarioEnBaseAValorTotalScaf == False:
+    if not fa_line.is_subitem and (
+        not line.financial.unit_cost_capture and line.financial.unit_cost_capture <= 0
+    ):
+        errors.add_required_error(
+            field=f"line[{line_number}].financial.unit_cost_capture"
+        )
+
+    if not line.quantity.net_weight or line.quantity.net_weight <= 0:
+        errors.add_required_error(field=f"line[{line_number}].quantity.net_weight")
+
+    if not line.customs.origin_country:
+        errors.add_required_error(field=f"line[{line_number}].customs.origin_country")
+
+    if not line.customs.fraction_type:
+        errors.add_required_error(field=f"line[{line_number}].customs.fraction_type")
+
+    if (
+        fa_line.is_subitem and fa_line.contains_subitems
+    ) and not fa_line.subitem_number:
+        errors.add_required_error(field=f"line[{line_number}].subitem_number")
+
+    errors.raise_if_errors()
+
+    # Validar que si es un subitem, existe un item principal correspondiente
+    if fa_line.is_subitem and fa_line.subitem_number != 0:
+        principal_item_exists = db.query(
+            exists().where(
+                (LineItem.id == FaLineItem.id)
+                & (LineItem.item_id == item_header.id)
+                & (LineItem.line_number == line_number)
+                & (FaLineItem.is_subitem == False)
+                & (FaLineItem.contains_subitems == True)
+                & (LineItem.tenant_id == tenant_id)
+                & (LineItem.company_id == company_id)
+            )
+        ).scalar()
+
+        if not principal_item_exists:
+            errors.add_error(
+                field=f"line[{line_number}]",
+                message=f"No existe un item principal registrado para esta linea {line_number} con subitem {fa_line.subitem_number}",
+                solution=[
+                    "Registrar el item principal correspondiente a esta linea antes de registrar subitems."
+                ],
+                code="SUBITEM_WITHOUT_PRINCIPAL_ITEM",
+            )
+    
+    if fa_line.is_subitem and (fa_line.subitem_number == 0 or not fa_line.subitem_number):
+        errors.add_error(
+            field=f"line[{line_number}]",
+            message=f"El número de subitem no puede ser 0 si la línea es un subitem.",
+            solution=[
+                "Asignar un número de subitem mayor a 0 para esta línea."
+            ],
+            code="SUBITEM_NUMBER_INVALID",
+        )                    
+
     validate_common(db, line, tenant_id, company_id, errors, line_number)
+    
+    if not errors.has_errors():
+        pass