The exemption under clause 6 of a person using, or causing or permitting the use of, a truck and dog trailer combination is subject to the following conditions:

(a) if the combination is being used on a road other than a road specified in Schedule 1 , the combination must not –

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

(ii) exceed 50 tonnes in mass;

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

(i) 25 metres in length; or

(ii) 60.5 tonnes in mass;

(c) the mass of the dog trailer must not exceed the mass of the towing vehicle unless the combination has a gross mass in excess of 42.5 tonnes;

(d) if the combination has a gross mass in excess of 42.5 tonnes, all axle groups, except the steer axle, must have road-friendly suspension;

(e) if the combination has a gross mass in excess of 50 tonnes, the trailer couplings must have a coupling strength with a D value of at least 13.5;

(f) if the combination exceeds 22 metres in length, it must be fitted with a long vehicle sign in accordance with Division 4 of Part 2 of Schedule 3 to the Vehicle Operations Regulations;

(g) the combination must comply with the axle spacing requirements set out in Schedule 2 .