def _check_validity(cls, text):
        """Check the validity of a TLE

        Args:
            text (tuple of str)
        Raise:
            ValueError
        """

        if not text[0].lstrip().startswith('1 ') or not text[1].lstrip().startswith('2 '):
            raise ValueError("Line number check failed")

        for line in text:
            line = line.strip()
            if str(cls._checksum(line)) != line[-1]:
                raise ValueError("Checksum validation failed")
Check the validity of a TLE

        Args:
            text (tuple of str)
        Raise:
            ValueError