9F65

Track 2 Bit Map for CVC3 Check, commonly abbreviated PCVC3(Track2), is the track 2 equivalent of the position-mask role that PUNATC(Track1) (9F63) plays for track 1: it tells the terminal and host exactly which digit positions in track 2's discretionary data carry the dynamic CVC3 value covered elsewhere in this dictionary (9F61), rather than static, unchanging digits. It's related to 9F62 (the equivalent position mask concept applied elsewhere in the same flow) and to NATC(Track2) (9F67), which specifies how many ATC digits share that same discretionary-data space. This is a Mastercard PayPass (Kernel 2 mag-stripe mode) tag specifically - it exists because PayPass's mag-stripe-compatible contactless mode has to tell a legacy-style host parser precisely where its dynamic protection lives within an otherwise ordinary-looking track 2, since nothing about a standard ISO/IEC 7813 track format itself signals which digits are dynamic and which aren't. See EMV Contactless Book C-2.