A handicapped child placed for adoption, determined to be financially eligible for care at the time of placement, shall not be denied services pursuant to this article based upon the income of the adopting parents, nor shall the adopting parents be required to enter into any agreement to pay toward the costs of services authorized for the care. This section shall only apply to physical handicaps present, and diagnosed, at the time of adoption. Residence, for the purposes of this section, shall be that of the adopting parents.