Myanmar’s top three rulers resigned from the military on Friday, a senior army official said, paving their way to assume the most powerful roles in the country after a parliamentary election in November. The government will be formed by a civilian president chosen by the upper and lower houses following the nomination of three people. The two unsuccessful candidates become vice presidents. The shakeup raises the possibility that Than Shwe, 77, Myanmar’s leader since 1992, could be selected as president, while his close allies Muang Aye, 72, and Thura Shwe Man, 62, become vice presidents. Such appointments would reinforce a widely held view among political analysts that the elections amount to a charade in which Myanmar’s top generals simply exchange army fatigues for civilian clothes without altering the nation’s power structure.