The Constitution Alteration (Trusts) Bill 1912,[1] was an unsuccessful referendum held in 1913 that sought to alter the Australian Constitution to give the Commonwealth legislative power in respect to trusts.

The proposal was to alter the text of section 51 of the Constitution to read as follows:[2] 51.

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 the acquisition of monopolies.

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.