N.Y. EPT Law § 2-1.10

§ 2-1.10 Provisions relating to infants and minors\n (a) Unless the creator expressly provides to the contrary, in any\ninstrument executed prior to September first, nineteen hundred\nseventy-four, the words "minor", "minority", "infant", "infancy",\n"majority", "adult" and words of like import shall mean or refer to a\nperson or a class of persons under the age of twenty-one years or who\nshall have reached such age, according to the context, and, unless\notherwise expressly provided in any instrument executed on or after\nSeptember first, nineteen hundred seventy-four shall mean or refer to a\nperson or a class of persons under the age of eighteen years or who\nshall have reached such age, according to the context, except that any\ndesignation of a testamentary guardian of a "minor" or an "infant" shall\nrefer to a guardianship of a person who has not reached the age of\neighteen years, regardless of the date of the instrument containing the\ndesignation.\n (b) This act shall not apply to distributions made subsequent to\nSeptember first, nineteen hundred seventy-four and prior to the\neffective date of this act.\n