Births, Deaths and Marriages Registration Act 1995 No 62
20 Alteration of details after birth registration
(1) An application to the Registrar for the addition of registrable information in a person’s birth registration—(a) must be made in writing, and(b) must include the information required by the Registrar, and(c) must, if the Registrar requires verification of the information contained in the application, be accompanied by a statutory declaration verifying the information contained in the application and any other evidence that the Registrar may require.(2) This section is subject to section 18.(3) In this section, registrable information does not include information relating to a person’s change of sex.