Regulation 90 of the Principal Regulations is amended as follows:(a) by omitting from subregulation (1) "vehicle" twice occurring and substituting "light vehicle" ;(b) by omitting from subregulation (3) "vehicle" and substituting "light vehicle" ;(c) by omitting from subregulation (4) "motor vehicle" and substituting "light motor vehicle" ;(d) by omitting from subregulation (5) "trailer" first occurring and substituting "light trailer" .