N.Y. Relig. Corp. Law § 10
Two or more religious corporations may acquire such real property as may be necessary for use as a parsonage, and the right, title and interest of each corporation therein shall be in proportion to its contribution to the cost of such property. The trustees of each corporation shall, from time to time, appoint one of their number to be a trustee of such common parsonage property, to hold office during the pleasure of the appointing trustees or until his successor be appointed. The trustees so appointed shall have the care and management of such property and may make such improvements thereupon as they deem necessary, and determine the proportion of the expense of the maintenance thereof which each corporation shall bear. If at any time either of such corporations acquires or desires to acquire for its own exclusive use as a parsonage other real property, it may, in pursuance of the provisions of law, relating to the disposition of real property by religious corporations, sell and convey its interest in such common parsonage property to any one or more of the other corporations having an interest therein.
N.Y. Relig. Corp. Law § 10