This Tariff Concession Order (TCO 1133330) declares that imported goods described as “valve modules, molecular sieve, skid mounted” classified at 8481.80.90 are subject to item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995, effective 30 Sep 2011 (made under s.269P of the Customs Act 1901). Mechanically, it changes the customs duty treatment for those importers; the CEO’s delegate and customs provisions control application and revocation (ss.269P, 269SC–269SD). Importers must follow administrative steps to claim the concession and face revocation risk.