3.4.5.1.3.2 Receiving a TXUSER_SETTXTIMEOUT_MTAG_SETTXTIMEOUT, TXUSER_BEGIN2_MTAG_COMMIT, or TXUSER_BEGIN2_MTAG_ABORT Message
When the transaction manager communicating with an application facet receives one of these messages, it MUST follow the same message-processing rules as the CONNTYPE_TXUSER_BEGIN2 connection type acting as an acceptor, as specified in section 3.4.5.1.2.