(a) Whenever a child in foster family care or an agency boarding home or group home who is a public charge on a social services district is admitted to the schools of a school district in which the foster family home, agency boarding home or group home is located, whether upon initial enrollment in school or upon the subsequent removal of such child to another school district, the local social services commissioner or any voluntary authorized agency acting on his behalf in boarding out such child, shall transmit to the superintendent or equivalent school officer of the school district within 10 days of admission, the following information in writing:

(b) In addition to the notification specified in subdivision (a) of this section, the local social services commissioner or voluntary authorized agency acting on his behalf shall transmit to the superintendent or equivalent school officer of the school district in which the child resided at the time he became a public charge in foster care, within 10 days of the child's admission to the school district, the following information in writing:

(c) The provisions of this section are not applicable with respect to the school admission of any child who had been in foster family care as a public charge since prior to January 1, 1974 and whose tuition and cost of instruction had been borne by the social services district responsible for the care and maintenance of such child.