def update_server_cert(self, cert_name, new_cert_name=None,
                           new_path=None):
        """
        Updates the name and/or the path of the specified server certificate.

        :type cert_name: string
        :param cert_name: The name of the server certificate that you want
                          to update.

        :type new_cert_name: string
        :param new_cert_name: The new name for the server certificate.
                              Include this only if you are updating the
                              server certificate's name.

        :type new_path: string
        :param new_path: If provided, the path of the certificate will be
                         changed to this path.
        """
        params = {'ServerCertificateName' : cert_name}
        if new_cert_name:
            params['NewServerCertificateName'] = new_cert_name
        if new_path:
            params['NewPath'] = new_path
        return self.get_response('UpdateServerCertificate', params)