31. Every officer subject to this Act shall, on the issue or receipt of any such instrument, having any stamp attached thereto or impressed thereon, forthwith cancel every such stamp by writing or impressing thereon, in ink, his name and the date of such cancellation, so as effectually to prevent its being used again, or shall cancel such stamp in any other manner that the Government may direct.
R. S. 1964, c. 80, s. 32.