Price Variance Tolerance/Hold On Invoices

I have a question, we currently use zero tolerance on price when it comes to matching PO's to an invoice , this is on Oralce EBS R12.1.3

When we match a PO to an invoice and during the matching process increase the price, the invoice goes onto a Price hold and triggers of the Payables Hold Resolution Workflow requiring our Payables supervisor to release the hold.

When we decrease the price during the matching process the invoices are automatically approved with Approval Not Required.

Is there a way for the negative price changes to also place the invoice on Price hold and trigger of the same Payables Hold Resolution Workflow.