Add error condition

draft-ietf-quic-transport.md

@@ -1429,7 +1429,8 @@ to 1-RTT packets.  For instance, flow control limits from remembered transport
 parameters apply to all 0-RTT packets even if those values are increased by the
 handshake; increased limits from frames cannot be applied, because the client
 will send frames that use any increased limits in 1-RTT packets (see
-{{packet-0rtt}}).
+{{packet-0rtt}}).  A server MAY treat use of updated transport parameters in
+0-RTT as a connection error of type PROTOCOL_VIOLATION.
 
 
 ### New Transport Parameters