75. Where it is provided by law that a signature may be engraved or printed or affixed by means of an engraved, printed or lithographed facsimile, or that a mark may be made by means of a signature stamp, device or mechanical or automatic process, it shall be construed as allowing a signature to be affixed on a paper document otherwise than by hand, or as allowing a personal mark to be affixed on a paper document by someone else. Such a provision does not preclude the use of another mode of signature appropriate to the document in a medium other than paper.