public function DHLPackStationStatusChanged($aAddressData)
    {
        $bChangeDHLPackStation = false;
        $aAddressData = $this->fillPackStationFieldValue($aAddressData);
        $bIsDHLPackStation = ('0' == $aAddressData['is_dhl_packstation']) ? false : true;
        $oOldAddress = clone $this->GetShippingAddress();
        if ($bIsDHLPackStation != $oOldAddress->fieldIsDhlPackstation) {
            $bChangeDHLPackStation = true;
        }

        return $bChangeDHLPackStation;
    }