On 25 April 1945 , the UN Conference on International Organization began in San Francisco , attended by 50 governments and a number of non-governmental organizations involved in drafting the United Nations Charter . At the conference , H. V. Evatt of the Australian delegation pushed to further restrict the veto power of Security Council permanent members . Due to the fear that rejecting the strong veto would cause the conference 's failure , his proposal was defeated twenty votes to ten
UN Conference on International Organization
United Nations Conference on International Organization
United Nations Security Council