public function validateAdminOrderAddressSave(Varien_Event_Observer $observer)
    {
        /** @var Fontis_Australia_Helper_Address $helper */
        $helper = Mage::helper('australia/address');
        if (!$helper->isValidationOrderSaveEnabled()) {
            return;
        }

        /** @var Mage_Adminhtml_Model_Session $session */
        $session = Mage::getSingleton('adminhtml/session');
        $errors = $session->getMessages()->getErrors();

        if (count($errors) > 0) {
            // We had an error when saving the address, so we'll skip validation
            $session->addWarning('Address validation has been skipped.');
            return;
        }

        try {
            /** @var Mage_Adminhtml_Controller_Action $controller */
            $controller = $observer->getControllerAction();
            if (!$controller) {
                return;
            }

            $addressId = $controller->getRequest()->getParam('address_id');
            /** @var Mage_Sales_Model_Order_Address $address */
            $address = Mage::getModel('sales/order_address')->load($addressId);
            if ($address->getAddressType() !== Mage_Sales_Model_Order_Address::TYPE_SHIPPING) {
                return;
            }
            $order = $address->getOrder();
            if (!$order) {
                return;
            }

            $ignoreValidation = $controller->getRequest()->getParam('override_validation');

            if ($ignoreValidation) {
                $result = array(
                    Fontis_Australia_Helper_Address::ADDRESS_OVERRIDE_FLAG => true
                );
                $order->setAddressValidated(Fontis_Australia_Helper_Address::ADDRESS_OVERRIDE);
            } else {
                // Validate the address and store the result on the order.
                $result = $helper->validateOrderAddress($order);
            }

            $order->save();

            // Use the result to add a message to the session telling the
            // admin about the validation status.
            $helper->addValidationMessageToSession($result, $session);
        } catch (Exception $err) {
            Mage::logException($err);
        }
    }