I believe (please don't hold me to it) that the AMI for acne has a question relating to scarring. They just want to make sure you can wear any issued clothing, and that a mask or other protective gear (firefighting, gunnery, damage control, chemical gear, etc) will not cause any aggravation of the acne. In training candidates will be expected to be able to "suit up" and perform all mission requirements and maintain a seal on equipment. I think I recall it was a "self reporting" form, meaning no doctor, just the candidate stating they can wear anything and perform all required duties.