sentences:  The only significant brake on UNO's power was that its majority of 55 percent fell short of the 60 percent needed to amend the Sandinista-approved constitution, a goal of some members of the UNO coalition.The slim UNO majority also presented practical problems for the UNO president because it was possible for relatively few defections from the UNO coalition to undermine the UNO government's programs and initiatives.Under the 1987 constitution, the Supreme Court is an independent branch of government, whose members are selected for six-year terms by the National Assembly from lists submitted by the president.