Code identifying an organizational entity or a physical location.

If either D503 or D504 is present, then the other is required.

Free-form organization name or official title as it should appear for mailing address.

D502 will contain the constant: UNAVAILABLE if the name of the party to be notified is unknown, when D501 contains code N1 or N2.

Code designating the system/method of code structure used for Identification Code (67).

Code identifying a party.