Time Entries have a series of designations based on where they might be in the entry/invoicing/processing/grant application/federal reimbursement process.  Typically time admins will lock all entries within a pay period just before they submit payroll for payment. Time entries that are locked, but not yet invoiced may be changed/updated by a user with time admin rights.  They system requires the time admin to document the reason for change, and that comment becomes part of the time entry record.