Resolucion General 281/98 introduced the initial procedures that had to be accomplished in order to export the mentioned products http://www.infoleg.gov.ar/infolegInternet/anexos/50000-54999/54719/norma.htm ; it was replaced by Resolucion General 2108/2006, introducing new procedures. Resolucion General 2458/2008 introduces HS 7106.91.00 products http://www.infoleg.gov.ar/infolegInternet/anexos/140000-144999/141289/norma.htm .