Interdepartmental billing

Hi,

We are in the process of implementing interdepartmental billing in PS 9.2 Billing which will allow departments within one BU to invoice each other for goods and/or services provided. This will allow appropriate authorization of the charges to occur in the system before the expense is charged to the department.

My questions are

1. In PS 9.2 Billing, is there a way to achieve this without using intra unit? or

2. Is there a transfer functionality available in billing to achieve this functionality ? or

3. Is there any ways we can specify the charging and charged department in billing level other than specifying the department in chartfield level?