A friend of mine has just rang me and asked if someone has the 16th Edition Regs qualification but not the 17th Edition Regs qualification and they do not have the 2391 or 2395/6 should they be working on electrical installs and signing jobs off? I have told him that he needs the 17th Edition Regs no matter what and preferably the 2395/6 qualification to be doing electrical installs and signing them off. What's other people's take on this?