I would disagree with you , my tank has a welder on tag that the filler wipes off and reads as part of the visually inspection ,this is telling him the information that the tank meets code . also when a vehicle is being transferred to a new owner all propane equipment and tanks are to be inspected by a licensed propane inspector . I know this because the shop that inspect my campers has told me not to bring any more to them .Seems the MTO payed him a visit . to do the vehicle inspection certificate on a vehicle with propane the mechanic and shop must also hold a propane licence . but I do agree like a lot of things there are ten answers to the same question .