This is NOT meant to cast aspersions on anyone but seeing that this is a public forum we all may benefit.
something to just confirm, as this could have some unforeseen repercussion (also thinking about the insurance thread); I suggest checking (COJ at the least) the requirements - if any - for the registration of the Pr.Eng signing-off the install. Do they need to be registered locally with the ECSA, what category of registration etc.