Rather than an outright DQ for a potential DQ condition, a remedial is requested when DODMERB needs more information, usually in the form of another doctor's exam or test, or a letter/paperwork from your doctor.
My DS had asthma before the age of 13 and an inhaler prescribed at age 16. Instead of an outright DQ and then waiver, he was given a remedial and requested to take the methacholine challenge test. He passed, all paperwork/test results were sent to DODMERB, and he was qualified.