3816032 - How do I create or edit a Custom Expense Audit Rule?

I need to know how to create/edit a new Audit Rule that will flag an Exception message for a user when specific conditions are met within their expense report. How can I do this?

How do I create a custom/edit an Audit Rule to help users select the correct values for their Expense Reports? , KBA , CON-EXP-ADM-AUR , Audit Rules , CON-CA-ADM-PAS , Policy Assistance , CON-EXP-EXP , Expenses , Problem