The best I can do is refer you to the Library of Parliament's analysis of the bill. Subsection 429(2) of the Criminal Code reads as follows:
No person shall be convicted of an offence under sections 430 to 446 where he proves that he acted with legal justification or excuse and with colour of right.
In the bill, that new offence is covered in the provisions I just mentioned. Consequently, the provision can be be used by the defence in relation to the new offence mentioned in the bill.