1.In relation to construction products covered by a harmonised standard and which are individually manufactured or custom-made in a non-series process in response to a specific order, and which are installed in a single identified construction work, the performance assessment part of the applicable system, as set out in Annex V, may be replaced by the manufacturer by Specific Technical Documentation demonstrating compliance of that product with the applicable requirements and equivalence of the procedures used to the procedures laid down in the harmonised standards.
2.If the construction product referred to in paragraph 1 belongs to a family of construction products for which the applicable system for assessment and verification of constancy of performance is system 1 + or 1, as set out in Annex V, the Specific Technical Documentation shall be verified by a notified product certification body as referred to in Annex V.