N.Y. Comp. Codes R. & Regs. tit. 18, § 421.18
(a) Prior to placement of a child for adoption, inform prospective adoptive parents of the procedures necessary for finalizing an adoption in accordance with section 421.19(i)(5) of this Part.
(b)
(d) Make placement decisions on the basis of the best interests of the child, including but not limited to:
(3) the requirement of authorized agencies to place minor siblings or half-siblings together in accordance with section 421.2(e) of this Part, unless the social services district, or the voluntary authorized agency with the guardianship and custody, has determined such placement to be detrimental to the best interests of one or more of the children. Such determination must establish that the placement would be contrary to the health, safety or welfare of one or more of the children. The determination must be made after consultation with, or an evaluation by, other professional staff, such as a licensed psychologist, psychiatrist, other physician, or certified social worker. Factors to be considered in making a determination of whether siblings or half-siblings may be placed separately must include, but are not limited to: The factors used by the social services district to determine whether siblings or half-siblings are to be placed separately must be documented in the children's uniform case records in accordance with section 428.6 of this Title. In the case of a child in the guardianship and custody of a voluntary authorized agency, the factors used to determine whether the child and the child's siblings or half-siblings are to be placed separately must be documented in the children's case records.
(l) At the time of placement, enter the following information about the placement in a bound book in accordance with subdivision 5 of section 384 of the Social Services Law:
(m) To the extent available, provide to prospective adoptive parent(s) the psychological and medical histories, as described in section 373-a of the Social Services Law, of a child legally freed for adoption as well as that of his or her biological parents. In the case of finalized adoptions, such information shall be provided, upon request, to the child's adoptive parents. In all cases, information identifying biological parents shall be eliminated from all such psychological and medical histories. Agencies shall provide assistance to prospective adoptive parent(s) and adoptive parent(s) to understand the psychological and medical reports and the implications of such reports for the child's health.
(n)
Each authorized agency shall: