@staticmethod<EOL><INDENT>@abstractmethod<EOL>def official_record_ids():<DEDENT>
pass<EOL>
Shall return the official record_id for the VLR

        .. note::

            Even if the VLR has one record_id, the return type must be a tuple

        Returns
        -------
        tuple of int
            The record_ids this VLR type can have