28. The Act of 1908 is amended by the substitution of the following section for section 1:

“1. (1) Any male person who has carnal knowledge of a female person, who is to his knowledge his grand-daughter, daughter, sister or mother, shall be guilty of an offence and shall be liable on conviction on indictment to imprisonment for life or a lesser term of imprisonment.

(2) It shall not be a defence to proceedings for an offence under this section for the defendant to show that the carnal knowledge was had with the consent of the female person.”.