246. No act, document or writing is binding on the Bureau unless signed by the president or, to the extent determined by regulation, by the secretary.
The Bureau may, on the conditions and for the documents it determines, allow the required signature to be affixed by means of an automatic device, or allow a facsimile of the signature to be engraved, lithographed or printed. However, the facsimile has the same force as the signature only when the document is countersigned by a person authorized by the Bureau for that purpose.