Ratings files can be produced using any or all finalized events. Normally this is done once at the end of each month. It is done at the same time you produce your club's masterpoint files.
Once your club is in the CARDS rating system you will see an additional option in the export screen for you to produce the ratings file as well as your masterpoint files. Follow the same procedure as the masterpoint files production. The main difference is the ratings file can be automatically uploaded to the Internet. You will be asked if you want to do this. If you do not you will need to email the "rat" file later at your convenience.