Aengus Ó Snodaigh (Dublin South Central, Sinn Fein) | Oireachtas source

That is fine. It only a small change in the numbering system. Different countries are allocated different codes, but Ireland does not have its own. We have a small publishing industry and in the past there has been a demand by Books Ireland and others, including my father, who is a book publisher. He will not use the English system, as he calls it. It limits where he can sell because his books do not have the barcode on them. He is not the only publisher I know. It can become a source of small income to the national libraries that administer it. It probably needs to be looked at given Brexit. It may have implications for booksellers scanning books, in terms of taxes within Europe. I am not 100% sure; I have not discussed it with my father in a while.