3. The Government may, by regulation and subject to the conditions it determines,(1) exempt certain drivers of heavy vehicles, certain heavy vehicles or certain classes of heavy vehicles from the application of all or part of this Act;
(2) prescribe, for the purpose of harmonizing this Act with the rules governing persons who operate heavy vehicles mainly outside Québec, a weight other than that referred to in subparagraph a of subparagraph 3 of the first paragraph of section 2, or determine a total loaded mass applicable to those persons;
(3) prescribe notations to accompany the safety ratings referred to in section 12 and determine their effects.