Northern Territory Consolidated Acts28B. Application to Registrar change of sex
(1) An adult -
(a) whose birth is entered in the Register;
(b) who has undergone sexual reassignment surgery; and
(c) who is not married,
may apply to the Registrar, in a form approved by the Registrar, to register a change of the person's sex.
(2) The parents, parent (if a sole parent) or guardian of a child -
(a) whose birth is registered in the Register; and
(b) who has undergone sexual reassignment surgery,
may apply to the Registrar, in a form approved by the Registrar, to register a change of the child's sex.