Section 15 BASE METALS AND ARTICLES OF BASE METAL 73 Articles of iron or steel 73 02 Railway or tramway track construction material of iron or steel, the following : 73 02 10 73 02 10 00 Commodity Code Description 73 02 10 00 00 - Rails 73 02 30 00 00 - Switch blades, crossing frogs, point rods and other crossing pieces 73 02 40 00 00 - Fish-plates and sole plates 73 02 90 00 00 - Other