Section 51(i) of the Constitution of Australia

Section 51(i) of the Australian Constitution enables the Parliament of Australia to make laws about:

Trade and commerce with other countries, and among the States;[1]

The meaning of trade and commerce is clarified in section 98 of the Constitution which provides

The power of the Parliament to make laws with respect to trade and commerce extends to navigation and shipping, and to railways the property of any State.[2]
  1. ^ Constitution (Cth) s 51 Legislative powers of the Parliament.
  2. ^ Constitution (Cth) s 98 Trade and commerce includes navigation and State railways.