For laws to pass the Federation Council, a vote of more than half of its 187 senators is required. When considering federal constitutional laws, three-fourths of the Council's votes are required for passage. If the Council vetoes a law passed by the State Duma, the two chambers are mandated to form a Conciliation Committee in order to form a compromise document, which would again go under vote by both houses. The Federation Council's veto can be overcome by two-thirds majority in the Duma.