(1)Subsection (2) applies where a person relies on a defence under this Act.
(2)If evidence is adduced which is sufficient to raise an issue with respect to the defence, the court must assume that the defence is satisfied unless the prosecution proves beyond reasonable doubt that it is not.
(3)For the purposes of sections 6 and 8, an authorisation given before the coming into force of this Act has the same effect as one given on or after its coming into force.