Accrue at Receipt - disable with Page Composer or otherwise?

Summary:

We have a customer requirement where we interface PO lines with expense items which need the Accrue at Receipt field = Yes. Therefore we set the Accrue Expense Item setting to At Receipt in the Common Options for Payables and Procurement. This is needed, because if it's set to At period end, we can interface with the accrue at receipt flag = Yes, but then the PO will not be approved and get an error. 

However, we also enter manually PO's for expense items where we need to have this Accrue at Receipt checkbox = No. All in the same procurement BU. We need to different Document Styles to distinguish the interface PO (Trade) and manually entered PO (Non Trade).