Number allocation

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Can a product have more than one GTIN?
Can I reuse barcode numbers?
Can I sell or transfer my GTINs to anyone else?
Can I use GS1 UK numbers and barcodes outside of the UK?
Do I need a new GTIN if I update a product?
How do I activate my additional GTIN allocation? 
How do I find out who owns a GTIN or barcode?
How do I identify my products?
How many GTINs/barcode numbers do I need?
How to allocate a number/GTIN in My Numberbank
How to allocate GLNs in My Numberbank
How to bulk import and export your numbers in My Numberbank
How to identify different packaging levels in My Numberbank
What is Global Product Classification (GPC)?
Who is responsible for allocating GTINs? 
Why do I have to have a new GS1 Company Prefix (GCP) when I get a new batch of numbers?
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