tdracer,
Since the Lear 24 in 1965, all business jets, save the latest single pilot ones, are FAR 25 except the early ones like the Sabreliner which were CAR 4b. Transport category isn't just the preserve of Boeing/Airbus. The F510 test is quite severe, basically removes a window and frame. The Global cabin rises at about 800-1000fpm on the test. The descent is the same 4 minutes to the bottom. With HUGE speedbrakes and M.88, it does quite nicely, if a bit nerve-racking.
BTW, the latest ones have to have fuel inerting, too.