This Order (under s.269P of the Customs Act 1901) declares that parts described as “electric resistance seam welder, being welding heads” (tariff classification 8515.90.00) are goods to which item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995 applies, effective 19 May 2011 until revoked. Mechanically, it changes the tariff treatment applied to those imported parts, so importers’ costs and customs classification obligations are affected; the concession can be revoked under ss.269SC–269SD.