Each authorized agency shall:
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.
N.Y. Comp. Codes R. & Regs. Tit. 18 § 421.18