In all records, certificates or other papers hereafter made or executed, other than birth records and certificates or records of judicial proceedings in which the question of birth out of wedlock is at issue, requiring a declaration by or notice to the mother of a child born out of wedlock or otherwise requiring a reference to the relation of a mother to such a child, it shall be sufficient for all purposes to refer to the mother as the parent having the sole custody of the child, and no explicit reference shall be made to illegitimacy.