N.Y. Fam. Ct. Act § 1027-a

§ 1027-a. Placement of siblings. When a social services official\nremoves a child pursuant to this part, such official shall place such\nchild with his or her minor siblings or half-siblings who have been or\nare being remanded to or placed in the care and custody of such official\nunless, in the judgment of such official, such placement is contrary to\nthe best interests of the children. Placement with siblings or\nhalf-siblings shall be presumptively in the child's best interests\nunless such placement would be contrary to the child's health, safety,\nor welfare. If such placement is not immediately available at the time\nof the removal of the child, such official shall provide or arrange for\nthe provision of such placement within thirty days.\n