On 7 May 1906, the Governor, Admiral Sir Frederick Bedford, designated 6 principal executive offices of the Government under section 43(2) of the Constitution Acts Amendment Act 1899. The following ministers were then appointed to the positions, and served until the reconstitution of the Ministry on 30 June 1909.
On 30 June 1909, the Ministry was reconstituted following the resignation of Norbert Keenan. The Ministers sworn in then served until the end of the Ministry on 16 September 1910.
de Garis, Brian (1991). "Self-Government and Political Parties". In Black, David (ed.). The House on the Hill: A History of the Parliament of Western Australia 1832–1990. Perth, Western Australia: Parliament of Western Australia. ISBN0-7309-3983-9.