Regulation 18 Noise limits
In regulation 56(1), for sub-paragraph (a), substitute—
“(a)an agricultural motor vehicle, not being a category T tractor, which is first used on or after 1st June 1986 and which is driven at more than 20 mph;
(aa)a category T tractor which is first used on or after 1st June 1986 and which is driven at more than 40 km/h; or”.