37.17. Until 31 December 2014, the total loaded mass provided for in section 20 for a combination of road vehicles class A.19 consisting of a tractor and semi-trailer is increased to 49,500 kg if the combination meets the following specifications:(1) the semi-trailer was assembled before November 1998;
(2) the semi-trailer’s combination of axles is a triple axle or an equivalent combination of axles that belongs to class B.30 and the distance between the axes of the leading and rear axles of the combination is 4.8 m or more;
(3) the distance between the centre of the rear axle of the tandem of the tractor and the centre of the first of the Class B.30 axles is 5 m or more.
Until 31 December 2014, for a combination of road vehicles that has the specifications of a combination referred to in the first paragraph except for the characteristic concerning the distance between the centre of the rear axle of the tandem of the tractor and the centre of the first of the Class B.30 axles that is less than 5 m, the total loaded mass provided for in section 20 is increased to 48,500 kg less the product of 1,000 kg per slice of 500 mm below the 5-metre distance.