Page "American Bar Association Model Code of Professional Responsibility" Paragraph 3

The U. S. state of New York was the last state using the Code for many years, long after all other states – except California and Maine – had adopted the Model Rules.

On December 17, 2008, the administrative committee of the New York courts announced that it had adopted a heavily modified version of the Model Rules, effective April 1, 2009.

New York's version of the Model Rules was created by adjusting the standard Model Rules to reflect indigenous New York rules that had been incorporated over the years into its version of the Model Code.

Even though New York did not adopt the Model Rules verbatim, the advantage of adopting its overall structure is that it simplifies the professional responsibility training of New York lawyers, and makes it easier for out-of-state lawyers to conform their conduct to New York rules by simply comparing their home state's version of the Model Rules to New York's version.