The Beef Cattle Marketing Act, R.S.O. 1990, c. B.5, s. 3, provides:
3(1) Except under the authority of a licence, no person shall sell cattle.
(2) Every person who sells cattle shall be deemed to be the holder of a licence.
This technique certainly cuts down on unnecessary paper work!
I did not find this; a colleague directed me to it. He described it as “the best tautological statutory provision” that he had seen.