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The 2008 and 2014 NYC Construction Codes are based on I-Codes established by the International Code Council. I-Codes are known as the standard International Construction Codes (ICC), many of which have been adopted and modified by various jurisdictions including New York City. While I-Codes include an “International Existing Buildings Code”, New York City allows existing buildings to comply with applicable regulations of the 1968 and 1938 NYC Building Codes as set forth in the 2014 Administrative Codes.