I run a ton of HPDEs and NEVER failed tech with Schroths, with any group. They are street legal belts for a 2006 and below MINI, they work with the belt tensioners, there is no reason on god's green earth that you can't run in class 2 with them. Class 1 requires cage/harness and at least 5 points. You don't want to run class 1 unless you enjoy being on track with race prepped GT3s.... I'm instructing with the Milwaukee PCA tomorrow....if you're going five or six point, that's where they get strict with the proper seat, harness bar and at least a 4 point bar.