High Quality Content by WIKIPEDIA articles! The Statute of Westminster 1931 is an Act of the Parliament of the United Kingdom (22 & 23 Geo. V c. 4, 11 December 1931) which established legislative equality between the self-governing dominions of the British Empire and the United Kingdom, with a few residual exceptions. The Statute remains domestic law within each of the other Commonwealth realms, to the extent that it was not rendered obsolete by the process of constitutional patriation.