IntraUnit Billing - Can you generate an AR Open Item or Generate an AP Voucher?

In the System Transaction Map, System Transaction BIIVC, under Options, there are three options: Print Invoice, Generate AR Open Item, and Generate AP Voucher. It appears that the Transaction Types IntraEntity, InterEntity, and InterUnit allow you to check any one of the three options: Print Invoice, Generate AR, and Generate AP Voucher. The IntraUnit Transaction Type only has the checkbox under Print Invoice enabled. The checkbox under Generate AR Open Item and Generate AP Voucher is disabled. My question, is there any situation that the Transaction Type of IntraUnit can generate an AR Open Item and/or