—(1) Any surname of a child to be entered in respect of the registration of the birth of the child shall be that of the father of the child; but where the child is illegitimate and the father is not an informant of the birth, the surname, if any, shall be that of the mother of the child.
(2) The registrar may at any time within 7 years after the birth of a child in his local registration area add the surname of the child to an entry in other respects complete, on proof to his satisfaction that the person on whose behalf the application is made is the person referred to in the entry and such addition shall be made known in writing to the Registrar-General.
(3) Where before 5th October 1979, the father of an illegitimate child was an informant of the birth of the child and —
the joint surnames of both parents of the child; or
the surname of the mother of the child,
has been entered in a register of births as having been given to the child, the registrar having the custody of the register shall, upon an application being made in accordance with subsection (4), forthwith enter in the register the surname of the father as having been given to that child, without making any erasure of the original entry.
(4) An application for the surname of the father of an illegitimate child to be entered in a register of births as having been given to the child shall —
be made in the prescribed form by any parent or guardian of the child or, where the child has attained 21 years of age, by himself; and
be accompanied by the prescribed fee.