Western Australian Timber Workers' Industrial Union of Workers (South West Land Division) v Western Australian Sawmillers' Association

The case involved an industrial dispute concerning hours, wages, and working conditions in the timber-working and sawmilling industry. The Australian Timber Workers' Union (ATWU) was the federal union representing employees. Prior to the making of an award by the Commonwealth Court of Conciliation and Arbitration on 23 January 1929, all members of the ATWU's Western Australian branch resigned and formed a new union registered under Western Australian law, the Western Australian Timber Workers' Industrial Union of Workers (South West Land Division). Subsequently, the Commonwealth Court made orders reopening its award, joining the new State union as a party, and restraining the Western Australian Court of Arbitration from dealing with disputes involving the State union that were covered by the federal award. The new State union then sought a determination from the High Court of Australia regarding the validity of these orders.

The High Court was required to determine several key legal issues. Firstly, it had to ascertain whether it possessed the jurisdiction and authority under section 21AA of the Commonwealth Conciliation and Arbitration Act 1904-1928 to determine the questions raised by the State union's summons. Secondly, the Court needed to decide whether the Commonwealth Court of Conciliation and Arbitration had the jurisdiction and authority to make the order reopening its award and joining the State union as a party, thereby binding it to the award. Thirdly, the High Court had to determine whether the Commonwealth Court had the jurisdiction and authority to issue an order restraining the Western Australian Court of Arbitration from dealing with industrial disputes submitted to it by the State union.

The High Court held that it had jurisdiction to determine the questions raised. However, it found that the Commonwealth Court of Conciliation and Arbitration lacked the jurisdiction and authority to make the order reopening the award and joining the newly formed State union as a party, as the State union was not registered under the Commonwealth Act and had not been a party to the original disputes in its corporate capacity. Furthermore, the Court determined that the Commonwealth Court also lacked the jurisdiction and authority to make the order restraining the Western Australian Court of Arbitration. This was because the restraining order was too broad and purported to bind persons and bodies not lawfully bound by the federal award, and the Commonwealth Court had no power to make such an order under section 20 of the Act or any other provision in relation to matters not properly before it.