V2.1 – Made 'parcel-characteristics' and child element 'weight' optional. 2002 – Updated AuthorizedReturnType to include create-public-key boolean element to generate publicly accessible label – Updated create-authorized-return-response to include optional public-key-info 2302 - Added to request: customer-barcode, customer-barcode-type, and create-qr-code - Added to response: customer-barcode and qr-code