This provision is applicable only if the values specified for the depth and the width of the seat surface ( i.e . 400 min of meer 50 mm and at least 450 mm respectively ) cannot be adhered to on grounds relating to the construction of the tractor ".
This provision is applicable only if the valüs specified for the depth and the width of the seat surface (i.e. 400 ± 50 mm and at least 450 mm respectively) cannot be adhered to on grounds relating to the construction of the tractor".