Application Identifier 703S is used to specify the ISO country code of the country in which the given company is located as well as the authorization number of the company.
The last digit indicates which number in the supply chain the company in question has, which works with the meat. That is, 7030 is a slaughterhouse, 7031 is the first cutting company, 7032 is the second cutting company, etc.
According to standard, 703S is used together with GTIN number.