The Constitution Alteration (Trade and Commerce) Bill 1912,[1] was an unsuccessful referendum held in 1913 that sought to alter the Australian Constitution to extend Commonwealth legislative power in respect to trade and commerce.

The Parliament shall, subject to this Constitution, have Legislative power to make laws for the peace, order, and good government of the Commonwealth with respect to: The referendum was not approved by a majority of voters, and a majority of the voters was achieved in only three states.

[3][4] The 1911 referendum asked a single question that dealt with trade and commerce, corporations and industrial matters.

On each of the many occasions a similar question was asked at a referendum the public decided not to vest power in the Commonwealth over these matters.

[4] However, although many at the time felt strongly about the need for the Commonwealth to have limited control over commerce between the states, the High Court eventually gave much of the power to Commonwealth indirectly through later decisions, thus effectively removing the need for the Constitution to be changed anyway.