diff --git a/modules/purchase_trade/stock.py b/modules/purchase_trade/stock.py
index 0fe43d2..380e35e 100755
--- a/modules/purchase_trade/stock.py
+++ b/modules/purchase_trade/stock.py
@@ -3347,26 +3347,26 @@ class StatementOfFacts(ModelSQL, ModelView):
 
     @fields.depends('shipment', 'charter_party', 'applied_condition')
     def on_change_shipment(self):
-        if self.shipment and self.shipment.charter_party and not self.charter_party:
-            self.charter_party = self.shipment.charter_party
         self._set_default_applied_condition()
 
-    @fields.depends('charter_party', 'applied_condition')
+    @fields.depends('shipment', 'charter_party', 'applied_condition')
     def on_change_charter_party(self):
         self._set_default_applied_condition()
 
     def _set_default_applied_condition(self):
-        if self.applied_condition:
+        condition_ids = self.get_applied_conditions()
+        applied_condition_id = getattr(self.applied_condition, 'id', None)
+        if applied_condition_id in condition_ids:
             return
-        conditions = getattr(self.charter_party, 'conditions', None) or []
-        if len(conditions) == 1:
-            self.applied_condition = conditions[0]
+        self.applied_condition = None
+        if len(condition_ids) == 1:
+            self.applied_condition = condition_ids[0]
 
     def get_owner_charter_conditions(self, name=None):
-        if self.charter_party:
-            return ShipmentIn._unique_condition_ids(self.charter_party.conditions)
         if self.shipment:
             return self.shipment.get_owner_charter_conditions(name)
+        if self.charter_party:
+            return ShipmentIn._unique_condition_ids(self.charter_party.conditions)
         return []
 
     def get_purchase_charter_conditions(self, name=None):
diff --git a/modules/purchase_trade/tests/test_module.py b/modules/purchase_trade/tests/test_module.py
index c7baf95..8886fab 100644
--- a/modules/purchase_trade/tests/test_module.py
+++ b/modules/purchase_trade/tests/test_module.py
@@ -1457,6 +1457,35 @@ class PurchaseTradeTestCase(ModuleTestCase):
             sof._applied_compensation_amount(), Decimal('-12000.00'))
         self.assertEqual(sof.compensation_type, 'demurrage')
 
+    @with_transaction()
+    def test_sof_available_conditions_include_shipment_contracts(self):
+        'sof applied condition choices include owner, purchase and sale terms'
+        Sof = Pool().get('sof.statement')
+        sof = Sof()
+        sof.charter_party = None
+        sof.shipment = Mock(
+            get_owner_charter_conditions=Mock(return_value=[1]),
+            get_purchase_charter_conditions=Mock(return_value=[2]),
+            get_sale_charter_conditions=Mock(return_value=[3]))
+
+        self.assertEqual(sof.get_applied_conditions(), [1, 2, 3])
+
+    @with_transaction()
+    def test_sof_default_applied_condition_can_use_purchase_terms(self):
+        'sof default applied condition can come from purchase without charter'
+        Sof = Pool().get('sof.statement')
+        sof = Sof()
+        sof.charter_party = None
+        sof.shipment = Mock(
+            charter_party=None,
+            get_owner_charter_conditions=Mock(return_value=[]),
+            get_purchase_charter_conditions=Mock(return_value=[12]),
+            get_sale_charter_conditions=Mock(return_value=[]))
+
+        sof.on_change_shipment()
+
+        self.assertEqual(sof.applied_condition, 12)
+
     @with_transaction()
     def test_sof_laytime_start_reads_structured_condition_rule(self):
         'sof laytime start reads the structured event and offset'
diff --git a/modules/purchase_trade/view/sof_form.xml b/modules/purchase_trade/view/sof_form.xml
index e4e59e8..5955cb5 100755
--- a/modules/purchase_trade/view/sof_form.xml
+++ b/modules/purchase_trade/view/sof_form.xml
@@ -1,10 +1,8 @@
 <form>
   <notebook>
     <page string="Contract Conditions" id="cs">
-      <label name="charter_party"/>
-      <field name="charter_party"/>
+      <field name="charter_party" invisible="1"/>
       <field name="applied_conditions" invisible="1" colspan="4"/>
-      <newline/>
       <label name="applied_condition"/>
       <field name="applied_condition"/>
       <newline/>