> A representative for Geneva-based ISO said the new code, dubbed "5723 - Gun and ammunition shops" - would be available for financial institutions to use by th

> A representative for Geneva-based ISO said the new code, dubbed "5723 - Gun and ammunition shops" - would be available for financial institutions to use by the end of February. > "The decision to use the new merchant category code is eventually left up to the users in the industry," the ISO representative said. Does the merchant have control over their merchant code or does the financial network decide that?