regional organizers can create a class based on pretty much any criteria they want. The last two years in Kansas we have had a "Low Performance" class limited to gliders with a handicap of 1.115 (Standard Austria SH-1) and higher. This has created a welcoming environment for people with lower performance birds, most of which are just getting started in the contest and XC world. That way they aren't "competing" against ASG-29's.