Can the audit policy feature be turned on for specific payables business unit?

Summary:

For statutory reasons, some of my business units, representing non-US regions, need to have the audit policy turned on for most of all payables and payments activity. I have turned this feature on, but was wondering if there was a way to turn it on for a specific business unit, ledger, project, legal entity, etc. I am concerned about how this will impact the overall performance of the application. This link represents the instructions i used to turn this feature on -

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