Code identifying the Standard Carrier Alpha Code

Identification number assigned to the shipment by the carrier or consolidator

Code indicating type of action

Code indicating a Yes or No condition or response

If MBL04 is "Y", then issuer is an automated manifest system (AMS) participant. If "N", then issuer is not an AMS participant.

Code specifying extent of transportation service requested

Number of units (pieces) of the lading commodity

MBL06 is the actual quantity boarded on the conveyance.

Code identifying the Standard Carrier Alpha Code

MBL07 is the Standard Carrier Alpha Code (SCAC) of the carrier issuing the house bill.

Identification number assigned to the shipment by the carrier or consolidator

MBL08 is the bill of lading/waybill number submitted in the original 309.