commerce or overseas trade and commerce as well The High Court hence unanimously adopted Owen J's dissent in Swift Australian Co (Pty) Ltd v Boyd Parkinson, by holding that the Commonwealth was within power to produce legislation covering mixed activities. See also Section 51(i) of the Australian Constitution Australian constitutional law References Winterton, G. et al. Australian federal constitutional law: commentary and materials, 1999. LBC Information Services, Sydney. High Court of Australia cases 1964 in Australian law Australian constitutional law Trade and commerce power in the Australian Constitution cases 1964 in case law