The treaty was signed on 9 February 1920 and submitted for registration in the League of Nations Treaty Series on 21 October 1920.[3] There were 14 original High Contracting Parties: Denmark, France, Italy, Japan, the Netherlands,[4] Norway, Sweden, the United Kingdom (including the dominions of Australia, Canada, New Zealand, South Africa, India), and the United States.[5] Of the original signatories, Japan was the last to ratify the treaty on 2 April 1925, and the treaty came into force on 14 August 1925.[6]