3.3.5.3.2.3 Sending a Check Format Support Response Message
The structure and fields of the Check Format Support Response message are specified in section 2.2.5.2.3.
The client MUST send the Check Format Support Response message in response to a Check Format Support Request message. The client MUST NOT send any other message to the server between the Check Format Support Request and Check Format Support Response messages; otherwise, the server behavior is not defined.