IV.A.2. Recipient-Identification [Mandatory]
Identifies either the office/person/system that received the transaction and the time of receipt.

IV.A.3. Copy-Identification [Mandatory]
Identifies whether the copy encapsulated by the metadata is the sender's or the recipient's copy.

IV.A.4. Business-Transaction-Type [Optional]
Identifies the type of transaction (its business functional context).

IV.B.1. Originating-Organization [Mandatory]
Identifies the organizational unit engaged in the recorded transaction - from the legal entity down to the specific office of origin.