diff --git a/.upgrade.yml b/.upgrade.yml
index 7ae535e..1f5fd04 100644
--- a/.upgrade.yml
+++ b/.upgrade.yml
@@ -55,3 +55,9 @@ mappings:
   EditableLiteralFieldTest: SilverStripe\UserForms\Tests\Model\EditableFormField\EditableLiteralFieldTest
   SecureEditableFileFieldTest: SilverStripe\UserForms\Tests\Model\EditableFormField\SecureEditableFileFieldTest
   UserDefinedForm_EmailRecipientConditionTest: SilverStripe\UserForms\Tests\Model\Recipient\EmailRecipientConditionTest
+
+warnings:
+  methods:
+    'SilverStripe\UserForms\Model\EditableFormField->EffectiveDisplayRules()':
+      message: 'EffectiveDisplayRules deprecated because of new support for conditional required field'
+      url: 'https://github.com/silverstripe/silverstripe-userforms/pull/770/'
diff --git a/code/Model/EditableFormField.php b/code/Model/EditableFormField.php
index 2ec4f8f..b85c67d 100755
--- a/code/Model/EditableFormField.php
+++ b/code/Model/EditableFormField.php
@@ -926,6 +926,20 @@ class EditableFormField extends DataObject
             ->setRecord($this);
     }
 
+    /**
+     * Determine effective display rules for this field.
+     *
+     * @return SS_List
+     * @deprecated 5.6 No longer needed because of support for conditional required field.
+     */
+    public function EffectiveDisplayRules()
+    {
+        if ($this->Required) {
+            return ArrayList::create();
+        }
+        return $this->DisplayRules();
+    }
+
     /**
      * Extracts info from DisplayRules into array so UserDefinedForm->buildWatchJS can run through it.
      * @return array|null
diff --git a/tests/Model/EditableFormFieldTest.php b/tests/Model/EditableFormFieldTest.php
index 80de25b..227c8e8 100644
--- a/tests/Model/EditableFormFieldTest.php
+++ b/tests/Model/EditableFormFieldTest.php
@@ -73,12 +73,19 @@ class EditableFormFieldTest extends FunctionalTest
         // it has 1 rule - when ticked the checkbox hides the text field
         $this->assertEquals(1, $rules->Count());
 
+        // EffectiveDisplayRules rule has been deprecated
+        $this->assertEquals($rules, $checkbox->EffectiveDisplayRules());
+
         $checkboxRule = $rules->First();
         $checkboxRule->ConditionFieldID = $field->ID;
 
         $this->assertEquals($checkboxRule->Display, 'Hide');
         $this->assertEquals($checkboxRule->ConditionOption, 'HasValue');
         $this->assertEquals($checkboxRule->FieldValue, '6');
+
+        // If field is required then all custom rules are disabled
+        $checkbox->Required = true;
+        $this->assertEquals(0, $checkbox->EffectiveDisplayRules()->count());
     }
 
     public function testEditableOptionEmptyValue()
@@ -285,5 +292,4 @@ class EditableFormFieldTest extends FunctionalTest
         $field = $this->objFromFixture(EditableTextField::class, $fieldName);
         $this->assertEquals($expected, $field->isDisplayed($data));
     }
-
 }