It applies to any comp, but at the moment I believe there is a requirement in section 7 for cat 1 comps to use RACE for scoring the competition. I suppose if the organiser of a cat 1 comp want to use something other than RACE for generating the results they will have to talk to CIVL about it…
So the short answer is that in cat 2 comps, use FS if you like and send in the results as described above.
Also, if the official result for the cat. 2 comp is using some sort of filter, please make that clear in the mail and include a result file with the actual overall results, otherwise Paula in CIVL will not know they are generated.
Stein-Tore