Are the bar codes on outer cases part of a different system?
No. The GS1 System allows for three different bar code symbologies – EAN-13, ITF-14 and GS1-128 to be used on outer cases, which do not cross a retail point-of-sale. The numbering system is designed to be used for all packaging configurations, and the different symbols are used according to information requirements, scanning environment and the printing materials being used.