(1) Subject to subregulation (2) , the Vehicle Standards apply to light vehicles and light combinations on public streets.(2) Part 1 , regulation 21(1) and (4) , regulation 38(5) and (6) , regulation 41(3) , (4) and (5) , Division 19 of Part 8 and Part 13 apply to both (a) light vehicles and light combinations on public streets; and(b) heavy vehicles and heavy combinations on public streets.