Default PO Accrual Account

In setting up TAD for PO Accrual Account, how to indicate that accrual account will default with what has been entered manually in the PO Charge Account field except for the natural account (which is coming from mapping set)

In PRs, there is a Source Requisition Charge Account

In case of direct POs/POs without backing PRs, what should be used as source when the requirement needs PO Accrual Account to be copied from what is manually entered in PO Charge Account except for Natural account (e.g Project Segment, Cost Center etc), not any from the seeded Purchasing Charge Account Rule.