X12 990
X12 990 transaction set, response to a load tender.
Definition
The 990 answers a 204: the B1 segment carries the shipment number and SCAC, and the Reservation Action Code (B1) signals accept (A) or decline (D). It closes the load-negotiation loop before execution.
Origin
Defined by the Accredited Standards Committee X12 (ASC X12), accredited by ANSI, in the Transportation subseries (transaction set 990).
Example in context
ST*990*0001~B1*SCAC*123456*20260620*A~N9*RB*RATE001~SE*4*0001~