Effective January 15, 2021, all new Chip Card Terminals deployed with Contactless D-PAS support must disable support for Contactless MS Mode by setting Terminal Transaction Qualifiers (TTQ, Tag ‘9F66’) Byte 1, bit 8 to 0. Existing deployed Chip Card Terminals that support Contactless D-PAS may continue to support Contactless MS Mode.
Acquirers whose existing POS Devices support only Contactless MS Mode for Discover contactless acceptance must not disable support for Contactless MS Mode until they enable Contactless EMV Mode by setting TTQ Byte 1, bit 6 to 1.