...Standard & Poor's Ratings Services affirmed its '###/A-1' rating on New York City's fiscal 2012 series G, subseries G-4 general obligation bonds. The underlying rating (SPUR) on the bonds remains at '##'. The outlook is stable. The affirmation follows our review of documents related to an upcoming substitution of the enhancement provided to the bonds, in the form of a letter of credit (LOC) from PNC Bank N.A. (A/A-1), with a new LOC from Citibank N.A. (A/A-1). The long-term component of the dual rating currently reflects the long-term issuer credit ratings on, as well as joint support provided by, PNC Bank N.A. (A), the current LOC provider; and New York City (##), the obligor, assuming a low correlation. The short-term component of the dual rating solely reflects the short-term issuer credit rating on Citibank N.A. (A-1). As of the substitution date, which is currently expected to be April 1, 2015, the long-term component of the dual rating will reflect the long-term issuer credit ratings...