Vacation Rule, Worklist Access History

Hello,

We would like to create a report on vacation rules and worklist access grants so that if someone other than the supervisor approved the timecard, expense, or whatever, we can verify that a vacation rule or worklist access grant was in place.  Vacation rules are stored in wf_routing_rules table, and worklist access is stored in fnd_grants table.  But when rules are updated or deleted, is the original record kept in a history table anywhere?

Thank you, Kevin