Application Identifier 703S is used to specify the ISO country code for the country where the given company is located, as well as the authorization number for the company.
The last digit indicates which number in the supply chain the company in question has that works with the meat. That is, 7030 is a slaughterhouse, 7031 is the 1st cutting plant, 7032 is 2nd cutting plant, etc.
According to standard, 703S is used with GTIN number.