(1)  For the purposes of these regulations (other than the definitions of single axle group , tandem axle group , twinsteer axle group , tri-axle group and quad-axle group ) –

(a) 2 axles less than one metre apart are to be regarded as one axle; and

(b) 3 axles not more than 2 metres apart are to be regarded as 2 axles; and

(c) 4 axles not more than 3.2 metres apart are to be regarded as 3 axles.

(2)  A reference to a distance in subregulation (1) is a reference to the horizontal distance between the centre-lines of –

(a) in the case of subregulation (1)(a), the 2 axles; and

(b) in any other case, the outermost axles.