The exemption under clause 4 is subject to the following conditions:

(a) if the B-double is being used on a road not specified in Schedule 1 , the B-double must not –

(i) exceed, inclusive of its load, 21 metres in length, or 21.3 metres in length if it is fitted with a guard to prevent logs from shifting rearwards; or

(ii) exceed the aggregate axle load calculated in accordance with the allowable axle group loads of the combination, or 50 tonnes, whichever is the lesser; or

(iii) be fitted with more than 7 axles;

(b) if the B-double is being used on a road specified in Schedule 1 , the B-double must not exceed –

(i) 25 metres in length, inclusive of its load; or

(ii) subject to clause 12 , the aggregate axle load calculated in accordance with the allowable axle group of the combination, or 62.5 tonnes, whichever is the lesser;

(c) if the B-double exceeds 22 metres in length, it must be fitted with a long vehicle sign;

(d) the B-double must comply with Schedule 2 ;

(e) the distance G shown on the following diagrams must not be less than 6 metres, and the distance H must not be less than 7 metres:

(f) the distance X shown on the following diagram, minus the distance Y, must not exceed one metre and the distance Y, minus the distance X, must not exceed 1.3 metres: