Hello! My name is Adeline, I have a question concerning the NFPA 1981 version 2019. We've bought the latest 2019 version and according to the abstract, this latest version already replaces all previous versions. Yet there is a supplier in Taiwan claiming they can still provide SCBA with the 2013 certification. Is this possible? Did I misunderstand the context of the NFPA document? Please advise. Thank you!