National Congress of Argentina sessions span is from March 1 to November 30; the President of Argentina is entitled to convene extraordinary sessions during the recess, if needed. Senators and deputies enjoy parliamentary immunity during their mandates, which may be revoked by their peers if a senator or deputy is caught "in flagrante", in the midst of committing a crime. The Congress is in charge of setting taxes and customs, which must be uniform across the country. It rules the Central Bank of Argentina, manages internal and external debt payment, and the value of national currency (currently the Argentine peso). It rules the legal
Economic history of Argentina conditions. Urquiza, president of the Confederation, issued the 'law of differential rights', benefiting the ships trading with the ports of the Confederation and but not with Buenos Aires. The end of the civil wars provided the political and legal stability necessary to assert property rights and cut transaction costs, contributing to the huge inflows of capital and labour resources that built modern Argentina. In 1866 an attempt was made to stabilize the currency, by introducing a system of convertibility, which restricted the monetary authorities to issue paper currency only if it was fully backed by gold or convertible foreign currency.