How the tolerance will be derived at the time of Invoice matching when vendor site doesn't have it.

In Suppliers setup under Oracles Payables for Oracle EBS R12.1 Invoice Management section has setup for Supplier Sites at the bottom of the page. Users can create a supplier sites where the user can select an Invoice Tolerance from the list of tolerances created in the Invoice Tolerances Template (Payables Manager/Setup/Invoice/Tolerances) and the user can also select a Services Tolerance.

Since 'Invoice Tolerance' is not a mandatory field, What if user leaves this field as blank while setting up a New supplier site, then how the tolerance will be derived at the time of Invoice matching in Invoice workbench screen for this supplier site. We have setup several Invoice Tolerance templates (both type of Goods and Services) but which one will be used for a supplier or site which doesn't have value for ‘Invoice Tolerance' under Invoice Management section of supplier creation screen.