Each borough is represented by a borough president. Brooklyn, Queens, and Staten Island each have a Borough Hall with limited administrative functions. The Manhattan Borough President's office is situated in the Manhattan Municipal Building. The Bronx Borough President's office used to be in its own Bronx Borough Hall but has been in the Bronx County Courthouse for decades. Since the abolition of the Board of Estimate in 1990 (due to a 1989 ruling of the U.S. Supreme Court), the borough presidents have minimal executive powers, and there is no legislative function within a borough. Executive functions in New York City are the responsibility of the Mayor of New York City, while legislative functions reside with the New York City Council. The borough presidents primarily act as spokesmen, advocates, and ceremonial leaders for their boroughs, have budgets from which they can allocate relatively modest sums of money to community organizations and projects, and appoint the members of the 59 largely advisory community boards in the city's various neighborhoods. The Brooklyn and Queens borough presidents also appoint trustees to the local public library systems in those boroughs.