Christmas Island Act 1958

is found to have been insane at the time of the commission of the offence;

is found or certified, or otherwise lawfully proved, to be unfit, on the ground of insanity, to be tried for the offence; or

is convicted of an offence and afterwards certified, or otherwise lawfully proved, to be insane;

to be a criminal lunatic within the meaning of the Removal of Prisoners (Territories) Act 1923; and

to have been removed to that State under that Act;