In this Division--
"severe risk breach lower limit" , for a particular mass requirement applying
to a heavy vehicle, means a mass equalling 120% of the maximum mass (rounded
up to the nearest 0.1t) permitted for the vehicle under that mass requirement.
"substantial risk breach lower limit" , for a particular mass requirement
applying to a heavy vehicle, means the higher of the following--
(a) a mass equalling 105% of the maximum mass (rounded up to the nearest 0.1t) permitted for the vehicle under that mass requirement;
(b) 0.5t.