(a) Whoever assumes the custody of a child of unknown parentage shall immediately report to the state registrar in writing: (1) The date and place of finding or assumption of custody; (2) sex, color or race and approximate age of child; (3) name and address of the person or institution with whom the child has been placed for care; and (4) name given to the child by the finder or custodian.

(b) The place where the child of unknown parentage was found or custody assumed shall be known as the place of birth and the date of birth shall be determined by approximation.

(c) The report shall constitute the certificate of birth.

(d) If the child is identified and a regular certificate of birth is found or obtained, the report shall be sealed and filed and may be opened only by court order.