Who made the 'Deepaval Declaration' and when?

The 'Deepavali Declaration' was made by Lord Irwin (Viceroy) in 1929, announcing that the British government's policy was to grant India Dominion Status (the eventual goal of self-government) at an unspecified future date. This declaration came just before Deepavali and was seen as an attempt to pacify Indian public opinion. However, the lack of specific timeline disappointed leaders like Gandhi and led to the decision to launch the Civil Disobedience Movement with the Salt March in 1930.