A certificate by the Attorney - General stating that:
(a) Australia or a specified foreign country is a party to a specified treaty;
(b) a specified treaty entered into force for Australia or a specified foreign country on a specified day; or
(c) on a day specified in the certificate, a specified treaty remained in force for Australia or a specified foreign country;
is, for the purpose of any proceedings under this Act, prima facie evidence of the matters stated in the certificate.