8. General restrictions on return.
(3) A person shall not be returned under this Act to a declared Commonwealth or foreign territory, or committed to or kept in custody for the purposes of the return, unless provision is made by the law of that territory, or by an arrangement made with that territory, that he will not, until he has left or has been free to leave that territory, be dealt with in that territory for or in respect of any offence committed before his return under this Act other than—
(a) the offence in respect of which he is returned;
(b) any lesser offence proved by the facts proved before the Magistrate on proceedings under section 12; or
(c) any other offence being an extraditable offence in respect of which the Attorney General may consent to his being so dealt with.
EDIT.