It is not the Public Prosecution Service's role to determine the validity of a law that would be brought before a judge.
There was a question on the impact when there are arguably contradictory laws. In those circumstances, one avenue, probably a very common avenue, to resolve that would be to prosecute the file, and if the defence raised that before the judge as a defence, we would bring forward the prosecution aspect, the defence would bring forward the defence aspect and a judge would rule.