N.Y. Educ. Law § 1902

§ 1902. Other districts may join central high school district. Other\nschool districts that were not included in the establishment of the\noriginal central high school district may join such district upon a vote\nof the majority of the electors of such district present and voting at a\ndistrict meeting duly called for that purpose and upon the consent of\nthe board of education of the central high school district and the order\nof the commissioner of education.\n