Match Approval Level

Hi

Is there a way to set the match approval level at the supplier site level ?

At the moment we can set it at the supplier header level. Navigation : Suppliers Definition page > Receiving > Match Approval Level

However the issue is although we setup the match approval level at the supplier level it is taking the match approval option from the Purchasing Options..is there a way to override these values..in other words to give the precedence to supplier level?

Thanks and Regards,