Shortly before the historic, June 30, 1996, elections to these posts, however, a senior Peronist Senator, Antonio Cafiero, succeeded in limiting the city's autonomy by advancing National Law 24.588, which reserved control of the 25,000-strong Policía Federal (the federally administered city police), the Port of Buenos Aires and other faculties to the national government.
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The 1880 Federalization of Buenos Aires was followed by a boom in foreign trade and European immigration, and in 1890, Mayor Francisco P. Bollini commissioned the construction of a new city hall.
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A 2005 agreement on principles between Mayor Aníbal Ibarra and President Néstor Kirchner was followed by the modification of the especially contentious article 7, which denied the city its own, local police force, in 2007 - though the "Cafiero Law" otherwise remains in force.
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