The United States order of precedence is a nominal and symbolic hierarchy of important positions within the government of the United States. The order is established by the President of the United States and can be changed at his direction. It has no legal standing and is instead used to dictate ceremonial protocol.
... one-third elected after a four-year period, two-thirds elected after the next four-year period. Beside the Senate there is the Chamber of Deputies or Câmara dos Deputados ...