1. Subject to the other conditions of validity that may be prescribed by law, the deeds, documents or writings listed in the provisions below and those relating thereto, when signed by the members of the personnel of the department or the position holders referred to therein or, as the case may be, by persons authorized to perform the duties of those persons on an interim basis, is binding on the Minister and may be attributed to him as though he had signed them himself, insofar as they act within their jurisdiction.