2840. Proof of a document a reproduction of which is in the possession of the State or of a legal person established in the public interest or for a private interest and which has been reproduced in order to keep permanent proof thereof may be made by the filing of a copy of the reproduction or an extract that is sufficient to identify it, together with a declaration attesting that the reproduction complies with the rules prescribed in this section.
A certified true copy or extract of the declaration may be received in evidence with the same force as the original.