It has been a general rule for drawing deeds and other legal documents from the earliest times, which one is taught when one first becomes a pupil to a conveyancer, never to change the form of words unless you are going to change the meaning, and it would be as well if those who are engaged in the preparation of Acts of Parliament would bear in mind that that is the real principle of construction.

Hadley v. Perks (1866), L. R. 1Q. B. 457.