protected function _isEachCodeLengthValid($aCodeLengths)
    {
        $blValid = true;

        foreach ($aCodeLengths as $sCountryAbbr => $iLength) {
            if (!$this->_isCodeLengthKeyValid($sCountryAbbr) ||
                !$this->_isCodeLengthValueValid($iLength)
            ) {
                $blValid = false;
                break;
            }
        }

        return $blValid;
    }