Bulgarian infrastructure operator NRIC has modified two orders to the extent that the Bulgarian Machine Factory Liezen will become a subcontractor for two work train orders awarded to Plasser & Theurer. The first order modification comprises the delivery and putting into operation of a continuously operating machine for tamping, levelling and straightening switches and tracks for a track gauge of 1,435 mm, as well as the associated additional equipment, tools, consumables, special tools, technical documentation, as well as maintenance and repair documentation. The second change to the order involves the delivery and putting into operation of a set of four special wagons for the transport and unloading of aggregates and overburden, for a track gauge of 1,435 mm, with a rotating conveyor belt and accessories, consumables, special tools, technical documentation, and documents for maintenance and repair work.