I don't think it would necessarily need to, IF you were 'being supervised' by someone (competent) who was going to sign for (and 'take responsibility' for) 'the construction'. However, if you were re-wiring the CU 'on your own', without any oversight, then I don't think that, strictly speaking, anyone but you could sign for 'the construction'.
I am, of course, talking about 'how it should be', and don't imagine that it is anything like a 'universal practice'
In totally different fields, I frequently 'sign for' work that I have 'overseen' but not necessarily done. However, if I signed for something without having in any way 'supervised it' (i.e. 'rubber stamping') I could be in very deep trouble, particularly if anything 'went wrong' as a result of the work that I had 'taken responsibility for', even though I'd had no involvement with its execution.
Kind Regards, John