72

Issuer Script Template 2 is the mirror image of Issuer Script Template 1 (71) in every way except timing: it carries the identical kind of post-issuance command content, but scheduled to run after the second GENERATE AC rather than before it - a distinction that matters because some issuer actions are only safe or meaningful once the transaction's outcome is already finalized (adjusting an offline counter based on a transaction that's now confirmed to have gone through, for instance), while others need to happen before the card commits to its final decision. Related to 71 and to the same Issuer Script Command (86) structure both templates wrap, the choice between the two is entirely the issuer host's to make when building the script, not something the terminal decides - the terminal's job is simply to deliver whichever template the host sends, in the timing slot that template specifies, without needing to understand what the script actually does. A terminal that runs a Template 2 script before the second GENERATE AC, or vice versa, has broken the one guarantee the two-template design exists to provide. See EMV 4.4 Book 3.