Standard&Poor's Ratings Services has assigned its 'AA-' rating to the New York Liberty Development Corp.?s (NYLDC) liberty revenue bonds, 1WTC-2011 series. The outlook is stable. NYLDC will use bond proceeds to purchase the Port Authority of New York and New Jersey?s consolidated bonds, 170th series. Under a financing and trust agreement, NYLDC is assigning to the trustee all of its rights, title and interest in to the authority's 170th series bonds and the bond fund. The trustee will deposit any PANYNJ payment on the 170th series bonds into the bond fund for payment on the series 1WTC-2011 bonds. These payments will be on par with all of the authority's consolidated bonds. As a result, the 1WTC-2011 bond rating