Regulation 62 of the Principal Regulations is amended as follows:(a) by omitting from subregulation (1) "motor vehicle, except an articulated bus," and substituting "light motor vehicle" ;(b) by omitting subregulation (2) ;(c) by omitting from subregulation (3) "trailer" first occurring and substituting "light trailer" ;(d) by omitting from subregulation (4) "semi-trailer" and substituting "light semi-trailer" .