In the case of a newly-born, abandoned or exposed child of unknown parentage the child shall be brought to the Commissioner or his deputy, in the registration district where such newly-born, abandoned or exposed child of unknown parentage is found, who shall examine the child to determine approximate age and date of birth. The Commissioner, or a qualified physician designated by him, shall assign a name to the child and prepare a standard birth certificate for such child. In order to preserve all identity possible, a personal description and all facts relative to the discovery of the child shall be placed on a note attached to the birth certificate or on the reverse side of the certificate.