Whenever a child is placed in or with a child care institution or in or with a child welfare agency, the placement shall, whenever practicable, be to, with or in the custody of a child care facility as is under the control of persons of the same religious faith as that of the child. Whenever a child is placed in a group care home or in a foster family home, the placement must, if practicable, be made with a person or persons of the same religious faith as that of the child.