What Article 31 asks for Art. 31(1), Art. 31(2), Art. 31(3)
Article 31 sets the purpose and the timing. The documentation must contain all relevant data on the means used to ensure the product and the manufacturer's processes comply with the essential requirements in Annex I, and it must contain at least the elements listed in Annex VII. It has to be drawn up before the product is placed on the market and continuously updated, where appropriate, at least during the support period.
Where the product is also subject to other Union legal acts that require technical documentation, you draw up a single set covering Annex VII and the other acts, rather than duplicating files.