The Captains Regent Capitani Reggenti of San Marino are elected every six months by the country's Grand and General Council. The pair serve as heads of state and government. Normally the Regents are chosen from opposing parties. They serve a six-month term. The investiture of the Captains Regent takes place on 1 April and 1 October every year. --- --- --- The practice of dual heads of government Diarchy is derived directly from the customs of the Roman Republic equivalent to the consuls of ancient Rome