MARRS has done it both by points and by (historical) times. I believe the process is chosen by the individual class reps, and not by sweeping edict, thus each run group may differ. Reach out to Dave Parker and/or Matt Yip for details.

SAARC/MARRS at VIR is done by the host regions rules, and thus a land rush. Some less attentive MARRS regulars were caught out by that last year.