An interim proposal to tackle the divisive issue of Security Council reform would expand the UN's most powerful body from 15 to 22 members but leave it up to the 192 UN member states to decide what countries should fill them. The proposal, obtained Friday by The Associated Press, also leaves it up to UN members to decide how long the new seats should be held - with suggestions of two years, five years and permanent seats as possible options. It leaves the contentious issue of veto power to future negotiations. There is strong support for enlarging the Security Council to reflect the world today rather than the global power structure after World War II when the United Nations was created. But all previous attempts, starting in 1979, have failed because national and regional rivalries blocked agreement on the size and composition of an expanded council.