The Balfour Declaration was the British declaration of sympathy with Zionist aspirations. The declaration was communicated to Lord Rothschild by Arthur James Balfour, in his capacity as foreign secretary, in a letter, dated November 2, 1917, and made public a week later: Balfour's name has been associated with the Declaration, as he warmly advocated it; but the final decision rested with the war cabinet, which gave its approval as a considered act of policy. The Declaration was approved on April 24, 1920, at the Allies' conference at San Remo and incorporated in the Mandate on Palestine conferred upon Britain by the League of Nations on July 24, 1922. The struggle over its practical implementation lasted throughout the entire 30 years of British rule in Palestine.