Paragraph 6

The authority of the Post Office in respect of an invention may be given under paragraph 2 or 3 of this Schedule either before or after the patent is granted and either before or after the acts in respect of which the authority is given are done, but not so as to authorise the doing before the appointed day of any act; and such authority may be given to any person whether or not he is authorised, directly or indirectly, by the patentee to make, use, exercise or vend the invention.