
The testing is done to the edition to which the installation was installed eg if it was installed under the 16th, then it should comply with the 16th - the regs are not restrospective.
However, you should note as a code 4 (does not comply with current regs) where it does not - so for example no RCD protection for concealed cables/socket outets under normal person control etc.
Any NEW work you do HAS to comply with the 17th
Hope this helps
SB

I find it more helpful to see it in terms of did it comply on installation? What doesn't comply now? (code 4).
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