For what purpose will the Agent (AGT) field be used by the importing air carrier?

For what purpose will the Agent (AGT) field be used by the importing air carrier?

Although the Agent (AGT) field will no longer be used by the inbound air carrier to nominate an alternate transmitting party, the inbound air carrier will be required by regulation (part 122.48a(d)(1)(xv)) to use the AGT field for the purpose of identifying the party which is to submit the house air waybill information, when it does not submit such information on its own.