Minister of State for Home Affairs v Siam Polyethylene Co Ltd (No 2)

The Minister of State for Home Affairs brought an appeal against Siam Polyethylene Co Ltd concerning the continuation of anti-dumping measures imposed on exports of linear low-density polyethylene (LLDPE) from Thailand. The case was heard in the Federal Court of Australia. Siam Polyethylene Co Ltd contested the Minister's decision to continue the anti-dumping measures. The legal issues the court needed to address included whether the Minister's decision was lawful, reasonable, and based on appropriate considerations.

The court found that the Minister's decision was not supported by the evidence presented. The court noted that the evidence did not demonstrate a likelihood of material injury to the Australian industry if the anti-dumping measures were discontinued. Furthermore, the court was critical of the Minister for allowing new arguments to be introduced during the appeal, which had not been considered in the primary decision. The court emphasised that parties should generally be bound by the arguments they advance at first instance and during the appeal. The court also highlighted that allowing new arguments during the appeal transforms the appellate court into a de facto court of first instance, which should be avoided.

The appeal was dismissed, and the orders made by Rares J on 12 August 2009 were set aside. The court did not make an order as to costs. The Minister was required to reconsider the recommendation to continue the anti-dumping measures in light of the court's decision. The court's decision underscores the importance of parties presenting all relevant arguments at the appropriate stage of the proceedings to avoid unnecessary delays and additional costs.