I'm obese. Part of the reason I stopped flying and let my medical lapse was the talk going around in 2012-ish about requiring a sleep study for a BMI over 40. I'm a very light sleeper and a CPAP is a deal-breaker for me. Anyway, it appears requirement never happened, and now it's just "screening" if obese. What does this screening consist of? My spouse attests that I don't have sleep apnea, but I'm worried about proving that to the FAA.