3.3.5.2.1.1.2 Receiving Other TXUSER_ASSOCIATE_MTAG Messages
When the application receives one of these messages:
the application MUST perform the following actions:
If the connection state is Awaiting Associate Response:
Set the connection state to Ended.
Return a failure result to the higher-layer business logic.
Otherwise, the message MUST be processed as an invalid message as specified in section 3.1.6.