N.Y. Real Prop. Tax Law § 428

§ 428. Fraternal organizations; entire net income for education and\nrelief of members. Real property owned by any fraternal corporation,\nassociation or body created to build and maintain a building or\nbuildings for its meeting or meetings of the general assembly of its\nmembers or subordinate bodies thereof and for the accommodation of other\nfraternal corporations, associations or bodies, the entire net income of\nwhich real property is exclusively applied or to be used to build,\nfurnish and maintain one or more asylums, homes or schools for the free\neducation or relief of its members or for the relief, support and care\nof the worthy and indigent members thereof, their spouses, surviving\nspouses or orphans, shall be exempt from taxation and exempt from\nspecial ad valorem levies and special assessments to the extent provided\nin section four hundred ninety of this chapter.\n