Caoimhghín Ó Caoláin (Cavan-Monaghan, Sinn Fein) | Oireachtas source

I have a brief supplementary question, although it is not directly related to the point to which Mr. Barron has just responded. We are advised in one of the briefing notes that there are four categories of medical device. They indicate that class 1 encompasses everything from sticking plasters to the items on which Mr. Barron and I depend. It goes all the way up to class 3, which concerns implants. If the highest level is three, is there a fourth category?