Amendment Rules General Rules Non-financial changes are permitted on all booking statuses, including: Planned Booked Customer Invoiced Vendor Invoiced Financial changes are only permitted when: The booking is in Planned or Booked status, or The amendment results in a higher net value than the existing booking. The system does not allow financial changes that would: Reduce the net value on a booking that has already been invoiced Modify locked bookings without first stepping the status back If a user attempts a prohibited change: A system message will prevent the action from continuing The booking must be stepped back to an editable status before proceeding