This Order treats imported drill collars (Customs tariff classification 8431.43.00) that conform to American Petroleum Institute Specification 7:2001 as goods covered by Schedule 4 Part III item 50, effective 19 November 2008. Mechanically, that makes those imports eligible for the tariff concession listed at item 50, reducing or removing the customs duty. It affects importers of such drill collars (lowering their import costs), requires customs to verify API‑7 conformity, and means the Commonwealth forgoes corresponding tariff revenue.