If an in-bond authorization message has already been received, can the in-bond record be cancelled through Air AMS?

If an in-bond authorization message has already been received, can the in-bond record be cancelled through Air AMS?

Yes.  An in-bond movement authorization may be cancelled.  According to the CAMIR-Air, the transfer line (TRN) is used to indicate a request for both in-bond and local transfer (permit to transfer) authorization.  To cancel in-bond and permit to transfer authorization, an Air AMS participant may transmit a Freight Report Change (FRC) message with TRN/000 (numeric zeros).