- To guarantee that only the latest validated version of the spreadsheet is being used and to maintain the validated state of the spreadsheet, all validated Excel spreadsheets should be stored with read only access rights for the end users (e.g., on a protected network share). Only responsible persons should have write access to the network share.
- End users should have no right to modify a validated spreadsheet, add a non-validated spreadsheet to the share, or save data on the share. End users should only have the right to fill in the (permitted) cells and to print the data or save a copy to a data repository if needed.