public function showPlainTemplate()
    {
        $blPlain = (bool) \OxidEsales\Eshop\Core\Registry::getConfig()->getRequestParameter('plain');
        if ($blPlain === false) {
            $oUser = $this->getUser();
            if ($this->isEnabledPrivateSales() &&
                (!$oUser || ($oUser && !$oUser->isTermsAccepted()))
            ) {
                $blPlain = true;
            }
        }

        return (bool) $blPlain;
    }