<P> State Election Law defines the structure of political parties . It requires each party to have a state committee and allows them to organize county committees . The county committees are composed of at least two members elected from each election district (containing a maximum of 950--1150 registered voters). The law also allows the election of assembly district leaders . The political parties' county executive committees typically select candidates for local offices, to be ratified by the full county committees . Many small parties do not have county committees and designate candidates at the state level . The political parties' judicial nominating conventions select candidate New York Supreme Court justices . Candidates for the citywide offices of mayor, comptroller and public advocate are designated jointly by the five county executive committees of each party . In most cases, insurgents who are party members can challenge party - designated candidates by petitioning for a primary election . </P> <P> The Brooklyn Public Library and Queens Public Library are public library systems within their respective boroughs . The New York Public Library is a private, non-governmental library serving the Bronx, Manhattan, and Staten Island, that receives government funding . The New York City Housing Authority (NYCHA) provides public housing for low - and moderate - income residents . NYC Health + Hospitals (New York City Health and Hospitals Corporation, or HHC) operates public hospitals and clinics . The New York City Economic Development Corporation (NYCEDC) is the city's economic development corporation . </P> <P> The Metropolitan Transportation Authority (MTA) manages public transportation in the city, through its arm the New York City Transit Authority . Despite this name, the NYCTA, like the rest of the MTA, was created by the New York State Legislature as a public - benefit corporation, which the legislature and governor of New York control . The MTA also operates the Staten Island Railway within the city of New York, as well as the Long Island Rail Road and Metro - North Railroad, both of which are commuter lines that have termina in the city but run largely in the suburban counties of New York State and Connecticut . </P> <P> Other regional transportation is managed by the Port Authority of New York and New Jersey, including the bridges and tunnels between New York City and New Jersey, and all airports and seaports within the city . The Port Authority is jointly controlled by the Governor of New Jersey and Governor of New York . </P>

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