Please advise - GS1 has outlined terms for when a new GTIN is required. On their website, they have many triggers for when a new GTIN should be assigned. One of them being adding a conformity mark (such as CE mark ) , surely this is not something that can be enforced? GS1 sells barcodes , and so to me it would make sense that they put systems in place to make you use more barcodes. Additionally, GS1 is not the regulator. Where is the _actual_ regulation guiding new GTIN triggers ? Besides the MDR , I have not seen a legal document outlining this.