Invoicing after Customer PO related Sales Order Acceptance

Hello,

R12 gives us the functionality to defer invoicing till a particular line has received customer POD or Acceptance (Pre-Billing Acceptance) but many of our customer (mainly in Europe) want us to hold invoicing until acceptance or POD of the entire Sales Order or at times the entire Purchase Order (multiple sales orders) is Accepted or has received POD.

Does anyone know how to arrive at this functionality through configuration assuming that a PO will not always line up with a sales order?

Thanks!