It rather depends who has made the decision - in your question that is the designer - and arguably that should always be the case. It could  I suppose be the installer,  but then he or she would presumably be deviating from the plan, or requesting a concession - i.e. a plan variation to cover it so it goes back to the designers for checking. Everyone else is only obeying orders - they may like to understand why, and in a perfect world would have access to the explanation but they may not have to. (and in some odd cases like national security they may not be able to )

I suggest that it needs noting only in the bits signed by the responsible person. In practice there may be  a short note to refer out to a complex annex of justification or even another report or document that says why  'for this situation BS7671 is not appropriate because...' and goes on to show how equivalent standards of safety are met another way.

If need be that other document may be anything from public to secret UK eyes only, application dependent.

Mike.

It rather depends who has made the decision - in your question that is the designer - and arguably that should always be the case. It could  I suppose be the installer,  but then he or she would presumably be deviating from the plan, or requesting a concession - i.e. a plan variation to cover it so it goes back to the designers for checking. Everyone else is only obeying orders - they may like to understand why, and in a perfect world would have access to the explanation but they may not have to. (and in some odd cases like national security they may not be able to )

I suggest that it needs noting only in the bits signed by the responsible person. In practice there may be  a short note to refer out to a complex annex of justification or even another report or document that says why  'for this situation BS7671 is not appropriate because...' and goes on to show how equivalent standards of safety are met another way.

If need be that other document may be anything from public to secret UK eyes only, application dependent.

Mike.

Looking at the definition of “departure” it would seem that only the designer can determine if a departure is acceptable. If a departure is made by the constructor or the inspector then that departure would have to be justified by the designer as being no less safe than the level of safety that compliance with BS7671 would have afforded. So I don’t see the point in having space for departures under all the signatories.