The Expense Ops Edit permission is specifically designed for this scenario. It grants users the ability to edit expenses that have already been approved and are marked with "Include in Financials". This permission is intended for operational or financial adjustments before the expense is finalized through the creation of a Billing Event. It provides a controlled mechanism to correct data after initial approval but before it impacts billing and revenue recognition processes.

B. Expense Entry: This permission only allows users to create new expense records. It does not grant any rights to edit expenses, especially not after they have been approved.

C. Expense Edit: This permission allows a user to edit an expense before it has been submitted for approval. Once an expense is approved, this permission no longer applies.

1. Certinia PSA Documentation, "Permission Control Fields": This document details the specific functions of each field on the Permission Control object. It explicitly states: "Expense Ops Edit: When selected, gives users permission to edit expenses that have been approved, have 'Include in Financials' selected, but have not yet been billed."

2. Certinia PSA Documentation, "Security and Permissions": In the section covering expense management permissions, the hierarchy is explained. Expense Entry is the base level, Expense Edit allows modification pre-submission, and Expense Ops Edit is the elevated permission for post-approval, pre-billing modifications.