New York Consolidated Laws, Domestic Relations Law - DOM § 70. Habeas corpus for child detained by parent

(a) Where a minor child is residing within this state, either parent may apply to the supreme court for a writ of habeas corpus to have such minor child brought before such court; and on the return thereof, the court, on due consideration, may award the natural guardianship, charge and custody of such child to either parent for such time, under such regulations and restrictions, and with such provisions and directions, as the case may require, and may at any time thereafter vacate or modify such order. In all cases there shall be no prima facie right to the custody of the child in either parent, but the court shall determine solely what is for the best interest of the child, and what will best promote its welfare and happiness, and make award accordingly.

(b) Any order under this section which applies to rights of visitation with a child remanded or placed in the care of a person, official, agency or institution pursuant to article ten of the family court act or pursuant to an instrument approved under section three hundred fifty-eight-a of the social services law, shall be enforceable pursuant to the provisions of part eight of article ten of such act, sections three hundred fifty-eight-a and three hundred eighty-four-a of the social services law and other applicable provisions of law against any person or official having care and custody, or temporary care and custody, of such child.